Protective Life (PLPDZ) 10-Q 11 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	Apr. 23, 2018
Document and Entity Information
Entity Registrant Name	PROTECTIVE LIFE CORP
Entity Central Index Key	355,429
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		1,000

CONSOLIDATED CONDENSED STATEMEN

CONSOLIDATED CONDENSED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues
Premiums and policy fees	$ 889,166	$ 860,586
Reinsurance ceded	(345,423)	(316,076)
Net of reinsurance ceded	543,743	544,510
Net investment income	520,863	506,413
Realized investment gains (losses):
Derivative financial instruments	78,059	(69,878)
All other investments	(87,599)	22,841
Other-than-temporary impairment losses	(691)	(2,725)
Portion recognized in other comprehensive income (before taxes)	(2,954)	(5,106)
Net impairment losses recognized in earnings	(3,645)	(7,831)
Other income	114,411	109,242
Total revenues	1,165,832	1,105,297
Benefits and expenses
Benefits and settlement expenses, net of reinsurance ceded: (2018 - $347,637; 2017 - $263,377)	786,802	749,642
Amortization of deferred policy acquisition costs and value of business acquired	57,981	20,519
Other operating expenses, net of reinsurance ceded: (2018 - $43,117; 2017 - $51,017)	229,251	222,787
Total benefits and expenses	1,074,034	992,948
Income before income tax	91,798	112,349
Income tax expense	17,686	36,935
Net income	$ 74,112	$ 75,414

CONSOLIDATED CONDENSED STATEME3

CONSOLIDATED CONDENSED STATEMENTS OF INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Benefits and settlement expenses, reinsurance ceded	$ 347,637	$ 263,377
Other operating expenses, reinsurance ceded	$ 43,117	$ 51,017

CONSOLIDATED CONDENSED STATEME4

CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 74,112	$ 75,414
Other comprehensive income (loss):
Change in net unrealized gains (losses) on investments, net of income tax: (2018 - $(153,379); 2017 - $85,962)	(577,712)	159,641
Reclassification adjustment for investment amounts included in net income, net of income tax: (2018 - $181; 2017 - $(578))	681	(1,072)
Change in net unrealized gains (losses) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings, net of income tax: (2018 - $3; 2017 - $1,995)	11	3,703
Change in accumulated (loss) gain - derivatives, net of income tax: (2018 - $129; 2017 - $(362))	487	(672)
Reclassification adjustment for derivative amounts included in net income, net of income tax: (2018 - $24; 2017 - $72)	89	133
Change in postretirement benefits liability adjustment, net of income tax: (2018 - $0; 2017 - $0)	0	0
Total other comprehensive income (loss)	(576,444)	161,733
Total comprehensive income (loss)	$ (502,332)	$ 237,147

CONSOLIDATED CONDENSED STATEME5

CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Statement of Comprehensive Income [Abstract]
Change in net unrealized gains (losses) on investments, income tax	$ (153,379)	$ 85,962
Reclassification adjustment for investment amounts included in net income, income tax	181	(578)
Change in net unrealized gains (losses) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings, income tax	3	1,995
Change in accumulated (loss) gain - derivatives, income tax	129	(362)
Reclassification adjustment for derivative amounts included in net income, income tax	24	72
Change in postretirement benefits liability adjustment, income tax	$ 0	$ 0

CONSOLIDATED CONDENSED BALANCE

CONSOLIDATED CONDENSED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Fixed maturities, at fair value (amortized cost: 2018 - $41,165,316 ; 2017 - $41,153,551)	$ 40,023,550	$ 41,176,052
Fixed maturities, at amortized cost (fair value: 2018 - $2,674,129; 2017 - $2,776,327)	2,699,826	2,718,904
Equity securities, at fair value (cost: 2018 - $676,451; 2017 - $740,813)	681,520	754,360
Mortgage loans (related to securitizations: 2018 - $1,367; 2017 - $226,409)	6,846,633	6,817,723
Investment real estate, net of accumulated depreciation (2018 - $154; 2017 - $132)	7,531	8,355
Policy loans	1,594,642	1,615,615
Other long-term investments	920,939	915,595
Short-term investments	441,781	615,210
Total investments	53,216,422	54,621,814
Cash	307,724	252,310
Accrued investment income	497,984	491,802
Accounts and premiums receivable	127,762	124,934
Reinsurance receivables	5,090,572	5,075,698
Deferred policy acquisition costs and value of business acquired	2,434,154	2,199,577
Goodwill	793,470	793,470
Other intangibles, net of accumulated amortization (2018 - $154,449; 2017 - $140,368)	651,707	663,572
Property and equipment, net of accumulated depreciation (2018 - $25,492; 2017 - $22,926)	108,682	111,417
Other assets	208,366	227,357
Income tax receivable	6,753	76,543
Assets related to separate accounts
Variable annuity	13,549,068	13,956,071
Variable universal life	1,019,250	1,035,202
Total assets	78,011,914	79,629,767
Liabilities
Future policy benefits and claims	30,690,409	30,957,592
Unearned premiums	863,162	875,405
Total policy liabilities and accruals	31,553,571	31,832,997
Stable value product account balances	4,699,614	4,698,371
Annuity account balances	11,060,885	10,921,190
Other policyholders’ funds	1,114,823	1,267,198
Other liabilities	2,454,942	2,353,565
Deferred income taxes	1,068,091	1,232,407
Non-recourse funding obligations	2,728,689	2,747,477
Secured financing liabilities	778,947	1,017,749
Debt	1,096,368	945,052
Subordinated debt securities	495,324	495,289
Liabilities related to separate accounts
Variable annuity	13,549,068	13,956,071
Variable universal life	1,019,250	1,035,202
Total liabilities	71,619,572	72,502,568
Commitments and contingencies - Note 11
Shareowner’s equity
Common Stock: 2018 and 2017 - $0.01 par value; shares authorized: 5,000; shares issued: 1,000	0	0
Additional paid-in-capital	5,554,059	5,554,059
Retained earnings	1,412,583	1,560,444
Accumulated other comprehensive income (loss):
Net unrealized (losses) gains on investments, net of income tax: (2018 - $(149,309); 2017 - $6,883)	(561,687)	25,896
Net unrealized losses relating to other-than-temporary impaired investments for which a portion has been recognized in earnings, net of income tax: (2018 - $(3); 2017 - $(6))	(11)	(22)
Accumulated gain (loss) - derivatives, net of income tax: (2018 - $352; 2017 - $198)	1,323	747
Postretirement benefits liability adjustment, net of income tax: (2018 - $(3,469); 2017 - $(3,469))	(13,925)	(13,925)
Total shareowner’s equity	6,392,342	7,127,199
Total liabilities and shareowner’s equity	$ 78,011,914	$ 79,629,767

CONSOLIDATED CONDENSED BALANCE7

CONSOLIDATED CONDENSED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Fixed maturities at fair value, amortized cost	$ 41,165,316	$ 41,153,551
Fixed maturities at amortized cost, fair value	2,674,129	2,776,327
Equity securities, cost	676,451	740,813
Mortgage loans, related to securitizations	1,367	226,409
Investment real estate, accumulated depreciation	154	132
Other intangibles, accumulated amortization	154,449	140,368
Property and equipment, accumulated depreciation	$ 25,492	$ 22,926
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized (in shares)	5,000	5,000
Common Stock, shares issued (in shares)	1,000	1,000
Net unrealized gains (losses) on investments, income tax	$ (149,309)	$ 6,883
Net unrealized (losses) gains relating to other-than-temporary impaired investments for which a portion has been recognized in earnings, income tax	(3)	(6)
Accumulated loss - derivatives, income tax	352	198
Postretirement benefits liability adjustment, income tax	$ (3,469)	$ (3,469)

CONSOLIDATED CONDENSED STATEME8

CONSOLIDATED CONDENSED STATEMENTS OF SHAREOWNER'S EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In- Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2016					$ (654,523)
Increase (decrease) in shareowners' equity
Other comprehensive loss					692,994
Ending Balance at Dec. 31, 2017	$ 7,127,199	$ 0	$ 5,554,059	$ 1,560,444	12,696
Increase (decrease) in shareowners' equity
Cumulative effect adjustments	(92,525)			(81,973)	(10,552)
Net income for the nine months ended September 30, 2017	74,112			74,112
Other comprehensive loss	(576,444)				(576,444)
Total comprehensive income (loss)	(502,332)
Dividends to parent	(140,000)			(140,000)
Ending Balance at Mar. 31, 2018	$ 6,392,342	$ 0	$ 5,554,059	$ 1,412,583	$ (574,300)

CONSOLIDATED CONDENSED STATEME9

CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities
Net income	$ 74,112	$ 75,414
Adjustments to reconcile net income to net cash provided by operating activities:
Realized investment (gains) losses	13,185	54,868
Amortization of DAC and VOBA	57,981	20,519
Capitalization of DAC	(99,246)	(81,474)
Depreciation and amortization expense	16,763	15,474
Deferred income tax	20,965	29,133
Accrued income tax	69,790	6,737
Interest credited to universal life and investment products	178,238	160,239
Policy fees assessed on universal life and investment products	(351,128)	(335,883)
Change in reinsurance receivables	(14,874)	15,219
Change in accrued investment income and other receivables	(7,185)	(9,368)
Change in policy liabilities and other policyholders’ funds of traditional life and health products	(111,356)	(94,234)
Trading securities:
Maturities and principal reductions of investments	53,420	44,041
Sale of investments	67,298	85,382
Cost of investments acquired	(129,346)	(114,390)
Other net change in trading securities	(10,901)	3,801
Amortization of premiums and accretion of discounts on investments and mortgage loans	73,529	142,613
Change in other liabilities	27,947	19,373
Other, net	(21,303)	2,554
Net cash (used in) provided by operating activities	(92,111)	40,018
Cash flows from investing activities
Maturities and principal reductions of investments, available-for-sale	151,227	166,419
Sale of investments, available-for-sale	436,969	269,509
Cost of investments acquired, available-for-sale	(674,513)	(623,564)
Change in investments, held-to-maturity	18,000	11,000
Mortgage loans:
New lendings	(248,231)	(373,108)
Repayments	206,111	177,142
Change in investment real estate, net	583	832
Change in policy loans, net	20,973	14,729
Change in other long-term investments, net	(136,969)	(33,832)
Change in short-term investments, net	187,652	31,859
Net unsettled security transactions	48,994	7,361
Purchase of property, equipment, and intangibles	(2,244)	(8,118)
Net cash provided by (used in) investing activities	8,552	(359,771)
Cash flows from financing activities
Borrowings under line of credit arrangements and debt	375,000	255,000
Principal payments on line of credit arrangement and debt	(211,412)	(98,498)
Issuance (repayment) of non-recourse funding obligations	(18,000)	(11,000)
Secured financing liabilities	(238,802)	29,504
Dividends to shareowner	(140,000)	(143,848)
Investment product deposits and change in universal life deposits	884,607	901,387
Investment product withdrawals	(512,323)	(551,597)
Other financing activities, net	(97)	0
Net cash provided by financing activities	138,973	380,948
Change in cash	55,414	61,195
Cash at beginning of period	252,310	348,182
Cash at end of period	$ 307,724	$ 409,377

BASIS OF PRESENTATION

BASIS OF PRESENTATION	3 Months Ended
	Mar. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
BASIS OF PRESENTATION	BASIS OF PRESENTATION Basis of Presentation On February 1, 2015, Protective Life Corporation (the “Company”) became a wholly owned subsidiary of The Dai-ichi Life Insurance Company, Limited, a kabushiki kaisha organized under the laws of Japan (now known as Dai-ichi Life Holdings, Inc., “Dai-ichi Life”), when DL Investment (Delaware), Inc. a wholly owned subsidiary of Dai-ichi Life, merged with and into the Company. Prior to February 1, 2015, the Company’s stock was publicly traded on the New York Stock Exchange. Subsequent to the Merger date, the Company remains as an SEC registrant within the United States. The Company is a holding company with subsidiaries that provide financial services through the production, distribution, and administration of insurance and investment products. The Company markets individual life insurance, credit life and disability insurance, guaranteed investment contracts, guaranteed funding agreements, fixed and variable annuities, and extended service contracts throughout the United States. The Company also maintains a separate segment devoted to the acquisition of insurance policies from other companies. Founded in 1907, Protective Life Insurance Company (“PLICO”) is the Company’s largest operating subsidiary. These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for the interim periods presented herein. In the opinion of management, the accompanying financial statements reflect all adjustments (consisting only of normal recurring items) necessary for a fair statement of the results for the interim periods presented. Operating results for the three months ended March 31, 2018 , are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2018 . The year-end consolidated condensed financial data included herein was derived from audited financial statements but does not include all disclosures required by GAAP within this report. For further information, refer to the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 . The operating results of companies in the insurance industry have historically been subject to significant fluctuations due to changing competition, economic conditions, interest rates, investment performance, insurance ratings, claims, persistency, and other factors. Entities Included The consolidated condensed financial statements in this report include the accounts of Protective Life Corporation and subsidiaries and its affiliate companies in which the Company holds a majority voting or economic interest. Intercompany balances and transactions have been eliminated.

SUMMARY OF SIGNIFICANT ACCOUNTI

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Significant Accounting Policies For a full description of significant accounting policies, see Note 2 to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 . There were no significant changes to the Company's accounting policies during the three months ended March 31, 2018 other than those discussed below. Property and Casualty Insurance Products Property and casualty insurance products include service contract business, surety bonds, and guaranteed asset protection ("GAP"). Premiums and fees associated with service contracts and GAP products are recognized based on expected claim patterns. For all other products, premiums are generally recognized over the terms of the contract on a pro-rata basis. Commissions and fee income associated with other products are recognized as earned when the related services are provided to the customer. Unearned premium reserves are maintained for the portion of the premiums that is related to the unexpired period of the policy. Benefit reserves are recorded when insured events occur. Benefit reserves include case basis reserves for known but unpaid claims as of the balance sheet date as well as incurred but not reported ("IBNR") reserves for claims where the insured event has occurred but has not been reported to the Company as of the balance sheet date. The case basis reserves and IBNR are calculated based on historical experience and on assumptions relating to claim severity and frequency, the level of used vehicle prices, and other factors. These assumptions are modified as necessary to reflect anticipated trends. Effective January 1, 2018, the Company adopted Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers . In consideration of the amendments in this Update, the Company revised its recognition pattern for administrative fees associated with certain vehicle service and GAP products. Previously, these fees were recognized based on the work effort involved in satisfying the Company’s contract obligations. The Company will recognize these fees on a claims occurrence basis in future periods. To reflect this change in accounting principle, the Company recorded a cumulative effect adjustment as of January 1, 2018 that resulted in a decrease in retained earnings of $92.5 million . The pre-tax impact to each affected line item on the Company’s financial statements is reflected in the table below: As Reported Previous Accounting Method For The Three Months Ended March 31, 2018 (Dollars In Millions) Financial Statement Line Item: Balance Sheet Deferred policy acquisition costs and value of business acquired $ 2,434.2 $ 2,295.2 Other liabilities $ 2,454.9 $ 2,193.3 Statements of Income Other income $ 114.4 $ 113.2 Amortization of deferred policy acquisition costs and value of business acquired $ 58.0 $ 44.2 Other operating expenses, net of reinsurance ceded $ 229.3 $ 243.5 Accounting Pronouncements Recently Adopted ASU No. 2014-09 - Revenue from Contracts with Customers (Topic 606). This Update provides for significant revisions to the recognition of revenue from contracts with customers across various industries. Under the new guidance, entities are required to apply a prescribed 5-step process to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The accounting for revenues associated with insurance products is not within the scope of this Update. The Update was originally effective for annual and interim periods beginning after December 15, 2016. However, in August 2015, the FASB issued ASU No. 2015-14 - Revenues from Contracts with Customers: Deferral of the Effective Date , to defer the effective date of ASU No. 2014-09 by one year to annual and interim periods beginning after December 15, 2017. The Company adopted this Update using the modified retrospective approach via a cumulative effect adjustment to retained earnings as of January 1, 2018. The amendments in the Update, along with clarifying updates issued subsequent to ASU 2014-09, impacted some of the Company's smaller lines of business, specifically revenues at the Company's affiliated broker dealers and insurance agency, and certain revenues associated with the Company's Asset Protection products. The lines of business to which the revised guidance applies are not material to the Company’s financial statements. In consideration of the amendments in this Update, the Company revised its recognition pattern for administrative fees associated with certain vehicle service and GAP products. Previously, these fees were recognized based on the work effort involved in satisfying the Company’s contract obligations. The Company will recognize these fees on a claims occurrence basis in future periods. To reflect this change in accounting principle, the Company recorded a cumulative effect adjustment as of January 1, 2018 that resulted in a decrease in retained earnings of $92.5 million . The Company also implemented minor changes to its accounting and disclosures with respect to the lines of business referenced above to ensure compliance with the revised guidance. See above for additional discussion. ASU No. 2016-01 - Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this Update address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Most notably, the Update requires that equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) be measured at fair value with changes in fair value recognized in net income. The Update also introduces a single-step impairment model for equity investments without a readily determinable fair value. Additionally, the Update requires changes in instrument-specific credit risk for fair value option liabilities to be recorded in other comprehensive income. The amendments in this Update are effective for annual and interim periods beginning after December 15, 2017 and were applied on a modified retrospective basis. The Company recorded a cumulative-effect adjustment at the date of adoption, January 1, 2018, transferring unrealized gains and losses on available-for-sale equity securities to retained earnings from accumulated other comprehensive income. The impact of this adjustment, net of income tax, resulted in a $10.6 million increase to retained earnings and a corresponding decrease to accumulated other comprehensive income, resulting in no net impact to consolidated shareowner's equity. The Company has updated its disclosures in Note 4, Investment Operations and Note 5, Fair Value of Financial Instruments in accordance with the ASU. ASU No. 2016-15 - Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments. The amendments in this Update are intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. Specific transactions addressed in the new guidance include: Debt prepayment/extinguishment costs, contingent consideration payments, proceeds from the settlement of corporate-owned life insurance policies, and distributions received from equity method investments. The Update does not introduce any new accounting or financial reporting requirements, and is effective for annual and interim periods beginning after December 15, 2017 using the retrospective method. There was no financial impact. ASU No. 2016-18 - Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Task Force). The amendments in this update provide guidance on the presentation of restricted cash or restricted cash equivalents in the statement of cash flows, thereby reducing diversity in practice related to the presentation of these amounts. The amendments require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The Update is effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. There was no impact to the Company on adoption. ASU No. 2017-01 - Business Combinations (Topic 805): Clarifying the Definition of a Business. The purpose of this update is to clarify the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments in the Update provide a specific test by which an entity may determine whether an acquisition involves a set of assets or a business. The amendments in the Update are to be applied prospectively for periods beginning after December 15, 2017. The Company has reviewed the revised requirements, and does not anticipate that the changes will impact its policies or recent conclusions related to its acquisition activities. ASU No. 2017-07 - Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The amendments in this update require entities to disaggregate the current-service-cost component from other components of net benefit cost and present it with other current compensation costs in the income statement. The other components of net benefit cost must be presented outside of income from operations if that subtotal is presented. In addition, the Update requires entities to disclose the income statement lines that contain the other components if they are not presented on appropriately described separate lines. The amendments in this update are effective for interim and annual periods beginning after December 15, 2017. As provided for in the ASU, the Company expects to apply the provisions of the statement retrospectively for components of net periodic pension costs and prospectively for capitalization of the service costs component of net periodic costs and net periodic postretirement benefits. The Update did not impact the Company’s financial position, results of operations, or current disclosures. Accounting Pronouncements Not Yet Adopted ASU No. 2016-02 - Leases. The amendments in this Update address certain aspects of recognition, measurement, presentation, and disclosure of leases. The most significant change will relate to the accounting model used by lessees. The Update will require all leases with terms greater than 12 months to be recorded on the balance sheet in the form of a lease asset and liability. The lease asset and liability will be measured at the present value of the minimum lease payments less any upfront payments or fees. The Update also requires numerous disclosure changes for which the Company is assessing the impact. The amendments in the Update are effective for annual and interim periods beginning after December 15, 2018 on a modified retrospective basis. The Company has completed an inventory of all leases in the organization and is currently assessing the impact of the Update and updating internal processes to ensure compliance with the revised guidance. ASU No. 2016-13 - Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments. The amendments in this Update introduce a new current expected credit loss (“CECL”) model for certain financial assets, including mortgage loans and reinsurance receivables. The new model will not apply to debt securities classified as available-for-sale. For assets within the scope of the new model, an entity will recognize as an allowance against earnings its estimate of the contractual cash flows not expected to be collected on day one of the asset’s acquisition. The allowance may be reversed through earnings if a security recovers in value. This differs from the current impairment model, which requires recognition of credit losses when they have been incurred and recognizes a security’s subsequent recovery in value in other comprehensive income. The Update also makes targeted changes to the current impairment model for available-for-sale debt securities, which comprise the majority of the Company’s invested assets. Similar to the CECL model, credit loss impairments will be recorded in an allowance against earnings that may be reversed for subsequent recoveries in value. The amendments in this Update are effective for annual and interim periods beginning after December 15, 2019 on a modified retrospective basis. The Company is reviewing its policies and processes to ensure compliance with the requirements in this Update, upon adoption, and assessing the impact this standard will have on its operations and financial results. ASU No. 2017-08 - Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. The amendments in this update require that premiums on callable debt securities be amortized to the first call date. This is a change from current guidance, under which premiums are amortized to the maturity date of the security. The amendments are effective for annual and interim periods beginning after December 31, 2018, and early adoption is permitted. Transition will be through a modified retrospective approach in which the cumulative effect of application is recorded to retained earnings at the beginning of the annual period in which an entity adopts the revised guidance. The Company is currently reviewing its systems and processes to determine the financial and operational impact of implementing the Update, as well as to determine whether early adoption of the revised guidance is practicable. ASU No. 2017-12 - Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The amendments in this update are designed to permit hedge accounting to be applied to a broader range of hedging strategies as well as to more closely align hedge accounting and risk management objectives. Specific provisions include requiring changes in the fair value of a hedging instrument be recorded in the same income statement line as the hedged item when it affects earnings. In addition, after a hedge has initially qualified as an effective hedge the Update permits the use of a qualitative hedge effectiveness test in subsequent periods. The amendments in this Update are effective for annual and interim periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently assessing the impact this standard will have on its operations and financial results.

MONY CLOSED BLOCK OF BUSINESS

MONY CLOSED BLOCK OF BUSINESS	3 Months Ended
	Mar. 31, 2018
Closed Block Disclosure [Abstract]
MONY CLOSED BLOCK OF BUSINESS	MONY CLOSED BLOCK OF BUSINESS In 1998, MONY Life Insurance Company (“MONY”) converted from a mutual insurance company to a stock corporation (“demutualization”). In connection with its demutualization, an accounting mechanism known as a closed block (the “Closed Block”) was established for certain individuals’ participating policies in force as of the date of demutualization. Assets, liabilities, and earnings of the Closed Block are specifically identified to support its participating policyholders. The Company acquired the Closed Block in conjunction with the acquisition of MONY in 2013. Assets allocated to the Closed Block inure solely to the benefit of each Closed Block’s policyholders and will not revert to the benefit of MONY or the Company. No reallocation, transfer, borrowing or lending of assets can be made between the Closed Block and other portions of MONY’s general account, any of MONY’s separate accounts or any affiliate of MONY without the approval of the Superintendent of The New York State Department of Financial Services (the “Superintendent”). Closed Block assets and liabilities are carried on the same basis as similar assets and liabilities held in the general account. The excess of Closed Block liabilities over Closed Block assets (adjusted to exclude the impact of related amounts in AOCI) at the acquisition date of October 1, 2013, represented the estimated maximum future post-tax earnings from the Closed Block that would be recognized in income from continuing operations over the period the policies and contracts in the Closed Block remain in force. In connection with the acquisition of MONY, the Company developed an actuarial calculation of the expected timing of MONY’s Closed Block’s earnings as of October 1, 2013. Pursuant to the acquisition of the Company by Dai-ichi Life, this actuarial calculation of the expected timing of MONY's Closed Block earnings was recalculated and reset as February 1, 2015, along with the establishment of a policyholder dividend obligation as of such date. If the actual cumulative earnings from the Closed Block are greater than the expected cumulative earnings, only the expected earnings will be recognized in the Company’s net income. Actual cumulative earnings in excess of expected cumulative earnings at any point in time are recorded as a policyholder dividend obligation because they will ultimately be paid to Closed Block policyholders as an additional policyholder dividend unless offset by future performance that is less favorable than originally expected. If a policyholder dividend obligation has been previously established and the actual Closed Block earnings in a subsequent period are less than the expected earnings for that period, the policyholder dividend obligation would be reduced (but not below zero). If, over the period the policies and contracts in the Closed Block remain in force, the actual cumulative earnings of the Closed Block are less than the expected cumulative earnings, only actual earnings would be recognized in income from continuing operations. If the Closed Block has insufficient funds to make guaranteed policy benefit payments, such payments will be made from assets outside the Closed Block. Many expenses related to Closed Block operations, including amortization of VOBA, are charged to operations outside of the Closed Block; accordingly, net revenues of the Closed Block do not represent the actual profitability of the Closed Block operations. Operating costs and expenses outside of the Closed Block are, therefore, disproportionate to the business outside of the Closed Block. Summarized financial information for the Closed Block as of March 31, 2018 , and December 31, 2017 , is as follows: As of March 31, 2018 December 31, 2017 (Dollars In Thousands) Closed block liabilities Future policy benefits, policyholders’ account balances and other policyholder liabilities $ 5,760,621 $ 5,791,867 Policyholder dividend obligation — 160,712 Other liabilities 34,796 30,764 Total closed block liabilities 5,795,417 5,983,343 Closed block assets Fixed maturities, available-for-sale, at fair value $ 4,497,521 $ 4,669,856 Mortgage loans on real estate 107,826 108,934 Policy loans 692,632 700,769 Cash 39,464 31,182 Other assets 113,120 122,637 Total closed block assets 5,450,563 5,633,378 Excess of reported closed block liabilities over closed block assets 344,854 349,965 Portion of above representing accumulated other comprehensive income: Net unrealized investment gains (losses) net of policyholder dividend obligation: $(162,429) and $(13,429); and net of income tax: $34,911 and $2,820 (3,014 ) — Future earnings to be recognized from closed block assets and closed block liabilities $ 341,840 $ 349,965 Reconciliation of the policyholder dividend obligation is as follows: For The 2018 2017 (Dollars In Thousands) Policyholder dividend obligation, beginning of period $ 160,712 $ 31,932 Applicable to net revenue (losses) (11,712 ) (16,753 ) Change in net unrealized investment gains (losses) allocated to the policyholder dividend obligation (149,000 ) 26,001 Policyholder dividend obligation, end of period $ — $ 41,180 Closed Block revenues and expenses were as follows: For The 2018 2017 (Dollars In Thousands) Revenues Premiums and other income $ 39,612 $ 42,836 Net investment income 50,543 51,359 Net investment gains (237 ) 63 Total revenues 89,918 94,258 Benefits and other deductions Benefits and settlement expenses 79,952 80,108 Other operating expenses (319 ) 166 Total benefits and other deductions 79,633 80,274 Net revenues before income taxes 10,285 13,984 Income tax expense 2,160 4,895 Net revenues $ 8,125 $ 9,089

INVESTMENT OPERATIONS

INVESTMENT OPERATIONS	3 Months Ended
	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
INVESTMENT OPERATIONS	INVESTMENT OPERATIONS Net realized gains (losses) for all other investments are summarized as follows: For The 2018 2017 (Dollars In Thousands) Fixed maturities $ 2,783 $ 9,490 Equity gains and losses (1) (8,786 ) (9 ) Impairments (3,645 ) (7,831 ) Modco trading portfolio (84,709 ) 18,552 Other investments 3,113 (5,192 ) Total realized gains (losses) - investments $ (91,244 ) $ 15,010 (1) Beginning in the three month period ending March 31, 2018, all changes in the fair market value of equity securities are recorded as a realized gains (loss) as a result of the adoption of ASU No. 2016-01 Gross realized gains and gross realized losses on investments available-for-sale (fixed maturities and short-term investments) are as follows: For The 2018 2017 (Dollars In Thousands) Gross realized gains $ 8,049 $ 10,738 Gross realized losses: Impairment losses $ (3,645 ) $ (7,831 ) Other realized losses $ (5,267 ) $ (1,257 ) The chart below summarizes the fair value (proceeds) and the gains (losses) realized on securities the Company sold that were in an unrealized gain position and an unrealized loss position. For The 2018 2017 (Dollars In Thousands) Securities in an unrealized gain position: Fair value (proceeds) $ 142,133 $ 169,134 Gains realized $ 8,049 $ 10,738 Securities in an unrealized loss position (1) : Fair value (proceeds) $ 56,984 $ 12,452 Losses realized $ (5,267 ) $ (1,257 ) (1) The Company made the decision to exit these holdings in conjunction with its overall asset liability management process. The chart below summarizes the realized gains (losses) on equity securities sold during the period and equity securities still held at the reporting date. For The 2018 (Dollars In Thousands) Net gains (losses) recognized during the period on equity securities $ (8,786 ) Less: net gains (losses) recognized on equity securities sold during the period $ (1,702 ) Gains (losses) recognized during the period on equity securities still held $ (7,084 ) The amortized cost and fair value of the Company’s investments classified as available-for-sale are as follows: As of March 31, 2018 Amortized Gross Unrealized Gains Gross Unrealized Losses Fair Value Total OTTI Recognized in OCI (1) (Dollars In Thousands) Fixed maturities: Residential mortgage-backed securities $ 2,430,278 $ 11,723 $ (47,631 ) $ 2,394,370 $ 14 Commercial mortgage-backed securities 1,899,618 583 (58,695 ) 1,841,506 — Other asset-backed securities 1,238,929 15,376 (9,653 ) 1,244,652 — U.S. government-related securities 1,377,633 168 (50,001 ) 1,327,800 — Other government-related securities 282,664 6,421 (11,626 ) 277,459 — States, municipals, and political subdivisions 1,767,604 6,162 (73,487 ) 1,700,279 — Corporate securities 29,487,086 261,484 (1,188,797 ) 28,559,773 — Redeemable preferred stock 94,362 336 (4,129 ) 90,569 — 38,578,174 302,253 (1,444,019 ) 37,436,408 14 Short-term investments 371,290 — — 371,290 — $ 38,949,464 $ 302,253 $ (1,444,019 ) $ 37,807,698 $ 14 As of December 31, 2017 Amortized Gross Unrealized Gains Gross Unrealized Losses Fair Value Total OTTI Recognized in OCI (1) (Dollars In Thousands) Fixed maturities: Residential mortgage-backed securities $ 2,330,832 $ 19,413 $ (23,033 ) $ 2,327,212 $ 10 Commercial mortgage-backed securities 1,914,998 5,010 (30,186 ) 1,889,822 — Other asset-backed securities 1,234,376 20,936 (5,763 ) 1,249,549 — U.S. government-related securities 1,255,244 185 (32,177 ) 1,223,252 — Other government-related securities 282,767 9,463 (4,948 ) 287,282 — States, municipals, and political subdivisions 1,770,299 16,959 (45,613 ) 1,741,645 (37 ) Corporate securities 29,606,484 623,713 (528,187 ) 29,702,010 (1 ) Redeemable preferred stock 94,362 232 (3,503 ) 91,091 — 38,489,362 695,911 (673,410 ) 38,511,863 (28 ) Equity securities 735,569 22,318 (8,771 ) 749,116 — Short-term investments 558,949 — — 558,949 — $ 39,783,880 $ 718,229 $ (682,181 ) $ 39,819,928 $ (28 ) (1) These amounts are included in the gross unrealized gains and gross unrealized losses columns above. The fair value of the Company's investments classified as trading are as follows: As of March 31, 2018 As of December 31, 2017 (Dollars In Thousands) Fixed maturities: Residential mortgage-backed securities $ 265,547 $ 259,694 Commercial mortgage-backed securities 146,633 146,804 Other asset-backed securities 129,714 138,097 U.S. government-related securities 37,575 27,234 Other government-related securities 40,368 63,925 States, municipals, and political subdivisions 318,142 326,925 Corporate securities 1,645,899 1,698,183 Redeemable preferred stock 3,264 3,327 2,587,142 2,664,189 Equity securities 5,366 5,244 Short-term investments 70,491 56,261 $ 2,662,999 $ 2,725,694 The amortized cost and fair value of available-for-sale and held-to-maturity fixed maturities as of March 31, 2018 , by expected maturity, are shown below. Expected maturities of securities without a single maturity date are allocated based on estimated rates of prepayment that may differ from actual rates of prepayment. Available-for-sale Held-to-maturity Amortized Cost Fair Value Amortized Cost Fair Value (Dollars In Thousands) Due in one year or less $ 912,935 $ 909,757 $ — $ — Due after one year through five years 7,026,832 6,915,584 — — Due after five years through ten years 6,881,555 6,721,386 — — Due after ten years 23,756,852 22,889,681 2,699,826 2,674,129 $ 38,578,174 $ 37,436,408 $ 2,699,826 $ 2,674,129 The charts below summarizes the Company's other-than-temporary impairments of investments. All of the impairments were related to fixed maturities or equity securities. For The 2018 Fixed Maturities (Dollars In Thousands) Other-than-temporary impairments $ (691 ) Non-credit impairment losses recorded in other comprehensive income (2,954 ) Net impairment losses recognized in earnings $ (3,645 ) For The 2017 Fixed Maturities Equity Securities Total Securities (Dollars In Thousands) Other-than-temporary impairments $ (95 ) $ (2,630 ) $ (2,725 ) Non-credit impairment losses recorded in other comprehensive income (5,106 ) — (5,106 ) Net impairment losses recognized in earnings $ (5,201 ) $ (2,630 ) $ (7,831 ) There were no other-than-temporary impairments related to fixed maturities or equity securities that the Company intended to sell or expected to be required to sell for the three months ended March 31, 2018 and 2017 . The following chart is a rollforward of available-for-sale credit losses on fixed maturities held by the Company for which a portion of an other-than-temporary impairment was recognized in other comprehensive income (loss): For The 2018 2017 (Dollars In Thousands) Beginning balance $ 3,268 $ 12,685 Additions for newly impaired securities — — Additions for previously impaired securities — — Reductions for previously impaired securities due to a change in expected cash flows (1,033 ) (12,685 ) Reductions for previously impaired securities that were sold in the current period — — Ending balance $ 2,235 $ — The following table includes the gross unrealized losses and fair value of the Company’s investments that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of March 31, 2018 : Less Than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars In Thousands) Residential mortgage-backed securities $ 1,426,703 $ (29,466 ) $ 394,955 $ (18,165 ) $ 1,821,658 $ (47,631 ) Commercial mortgage-backed securities 984,307 (24,232 ) 756,845 (34,463 ) 1,741,152 (58,695 ) Other asset-backed securities 143,917 (1,784 ) 129,840 (7,869 ) 273,757 (9,653 ) U.S. government-related securities 145,876 (3,108 ) 1,054,322 (46,893 ) 1,200,198 (50,001 ) Other government-related securities 90,010 (4,221 ) 112,461 (7,405 ) 202,471 (11,626 ) States, municipalities, and political subdivisions 505,864 (10,768 ) 1,007,246 (62,719 ) 1,513,110 (73,487 ) Corporate securities 12,307,646 (337,936 ) 10,410,752 (850,861 ) 22,718,398 (1,188,797 ) Redeemable preferred stock 57,050 (1,408 ) 22,859 (2,721 ) 79,909 (4,129 ) $ 15,661,373 $ (412,923 ) $ 13,889,280 $ (1,031,096 ) $ 29,550,653 $ (1,444,019 ) RMBS and CMBS had gross unrealized losses greater than twelve months of $18.2 million and $34.5 million , respectively, as of March 31, 2018 . Factors such as the credit enhancement within the deal structure, the average life of the securities, and the performance of the underlying collateral support the recoverability of these investments. The other asset-backed securities had a gross unrealized loss greater than twelve months of $7.9 million as of March 31, 2018 . This category predominately includes student loan backed auction rate securities whose underlying collateral is at least 97% guaranteed by the Federal Family Education Loan Program (“FFELP”). At this time, the Company has no reason to believe that the U.S. Department of Education would not honor the FFELP guarantee, if it were necessary. The U.S. government-related securities and the other government-related securities had gross unrealized losses greater than twelve months of $46.9 million and $7.4 million as of March 31, 2018, respectively. These declines were related to changes in interest rates. The states, municipalities, and political subdivisions category had gross unrealized losses greater than twelve months of $62.7 million as of March 31, 2018 . These declines were related to changes in interest rates. The corporate securities category had gross unrealized losses greater than twelve months of $850.9 million as of March 31, 2018 . The aggregate decline in market value of these securities was deemed temporary due to positive factors supporting the recoverability of the respective investments. Positive factors considered include credit ratings, the financial health of the issuer, the continued access of the issuer to capital markets, and other pertinent information. As of March 31, 2018 , the Company had a total of 2,428 positions that were in an unrealized loss position, but the Company does not consider these unrealized loss positions to be other-than-temporary. This is based on the aggregate factors discussed previously and because the Company has the ability and intent to hold these investments until the fair values recover, and the Company does not intend to sell or expect to be required to sell the securities before recovering the Company’s amortized cost of the securities. The following table includes the gross unrealized losses and fair value of the Company’s investments that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2017 : Less Than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars In Thousands) Residential mortgage-backed securities $ 766,599 $ (9,671 ) $ 416,221 $ (13,362 ) $ 1,182,820 $ (23,033 ) Commercial mortgage-backed securities 757,471 (8,592 ) 796,456 (21,594 ) 1,553,927 (30,186 ) Other asset-backed securities 86,506 (322 ) 134,316 (5,441 ) 220,822 (5,763 ) U.S. government-related securities 94,110 (688 ) 1,072,232 (31,489 ) 1,166,342 (32,177 ) Other government-related securities 24,830 (169 ) 115,294 (4,778 ) 140,124 (4,947 ) States, municipalities, and political subdivisions 170,268 (1,738 ) 1,027,747 (43,874 ) 1,198,015 (45,612 ) Corporate securities 5,054,316 (55,795 ) 10,962,689 (472,394 ) 16,017,005 (528,189 ) Redeemable preferred stock 22,048 (1,120 ) 23,197 (2,383 ) 45,245 (3,503 ) Equities 86,586 (1,401 ) 91,195 (7,370 ) 177,781 (8,771 ) $ 7,062,734 $ (79,496 ) $ 14,639,347 $ (602,685 ) $ 21,702,081 $ (682,181 ) RMBS and CMBS had gross unrealized losses greater than twelve months of $13.4 million and $21.6 million , respectively, as of December 31, 2017 . Factors such as the credit enhancement within the deal structure, the average life of the securities, and the performance of the underlying collateral support the recoverability of these investments. The other asset-backed securities had a gross unrealized loss greater than twelve months of $5.4 million as of December 31, 2017 . This category predominately includes student loan backed auction rate securities whose underlying collateral is at least 97% guaranteed by the FFELP. At this time, the Company has no reason to believe that the U.S. Department of Education would not honor the FFELP guarantee, if it were necessary. The U.S. government-related securities and other government-related securities had gross unrealized losses greater than twelve months of $31.5 million and $4.8 million as of December 31, 2017 , respectively. These declines were related to changes in interest rates. The states, municipalities, and political subdivisions category had gross unrealized losses greater than twelve months of $43.9 million as of December 31, 2017 . These declines were related to changes in interest rates. The corporate securities category had gross unrealized losses greater than twelve months of $472.4 million as of December 31, 2017 . The aggregate decline in market value of these securities was deemed temporary due to positive factors supporting the recoverability of the respective investments. Positive factors considered include credit ratings, the financial health of the issuer, the continued access of the issuer to capital markets, and other pertinent information. As of March 31, 2018 , the Company had securities in its available-for-sale portfolio which were rated below investment grade of $1.8 billion and had an amortized cost of $1.9 billion . In addition, included in the Company’s trading portfolio, the Company held $217.2 million of securities which were rated below investment grade. Approximately $307.5 million of the available-for-sale and trading securities that were below investment grade were not publicly traded. The change in unrealized gains (losses), net of income tax, on fixed maturities, classified as available-for-sale is summarized as follows: For The 2018 2017 (Dollars In Thousands) Fixed maturities $ (884,219 ) $ 224,115 The amortized cost and fair value of the Company’s investments classified as held-to-maturity as of March 31, 2018 and December 31, 2017 , are as follows: As of March 31, 2018 Amortized Gross Holding Gross Holding Fair Total OTTI (Dollars In Thousands) Fixed maturities: Securities issued by affiliates: Red Mountain LLC $ 718,826 $ — $ (56,007 ) $ 662,819 $ — Steel City LLC 1,981,000 30,310 — 2,011,310 — $ 2,699,826 $ 30,310 $ (56,007 ) $ 2,674,129 $ — As of December 31, 2017 Amortized Gross Holding Gross Holding Fair Total OTTI (Dollars In Thousands) Fixed maturities: Securities issued by affiliates: Red Mountain LLC $ 704,904 $ — $ (19,163 ) $ 685,741 $ — Steel City LLC 2,014,000 76,586 — 2,090,586 — $ 2,718,904 $ 76,586 $ (19,163 ) $ 2,776,327 $ — During the three months ended March 31, 2018 and 2017 , the Company recorded no other-than-temporary impairments on held-to-maturity securities. The Company’s held-to-maturity securities had $30.3 million of gross unrecognized holding gains and $56.0 million of gross unrecognized holding losses by maturity as of March 31, 2018 . The Company does not consider these unrecognized holding losses to be other-than-temporary based on certain positive factors associated with the securities which include credit ratings of the guarantor, financial health of the issuer and guarantor, continued access of the issuer to capital markets and other pertinent information. These held-to-maturity securities are issued by affiliates of the Company which are considered variable interest entities ("VIE's"). The Company is not the primary beneficiary of these entities and thus the securities are not eliminated in consolidation. These securities are collateralized by non-recourse funding obligations issued by captive insurance companies that are affiliates of the Company. The Company’s held-to-maturity securities had $76.6 million of gross unrecognized holding gains and $19.2 million of gross unrecognized holding losses by maturity as of December 31, 2017 . The Company does not consider these unrecognized holding losses to be other-than-temporary based on certain positive factors associated with the securities which include credit ratings of the guarantor, financial health of the issuer and guarantor, continued access of the issuer to capital markets and other pertinent information. Variable Interest Entities The Company holds certain investments in entities in which its ownership interests could possibly be considered variable interests under Topic 810 of the Financial Accounting Standards Board (“FASB”) Accounting Standard Codification (“ASC” or “Codification”) (excluding debt and equity securities held as trading, available for sale, or held to maturity). The Company reviews the characteristics of each of these applicable entities and compares those characteristics to applicable criteria to determine whether the entity is a VIE. If the entity is determined to be a VIE, the Company then performs a detailed review to determine whether the interest would be considered a variable interest under the guidance. The Company then performs a qualitative review of all variable interests with the entity and determines whether the Company is the primary beneficiary. ASC 810 provides that an entity is the primary beneficiary of a VIE if the entity has 1) the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance, and 2) the obligation to absorb losses of the VIE that could potentially be significant to the VIE or the right to receive benefits from the entity that could potentially be significant to the VIE. Based on this analysis, the Company had an interest in two subsidiaries as of March 31, 2018 and December 31, 2017, Red Mountain LLC ("Red Mountain") and Steel City LLC ("Steel City"), that were determined to be VIEs. The activity most significant to Red Mountain is the issuance of a note in connection with a financing transaction involving Golden Gate V Vermont Captive Insurance Company (“Golden Gate V”) in which Golden Gate V issued non-recourse funding obligations to Red Mountain and Red Mountain issued a note (the "Red Mountain Note") to Golden Gate V. For details of this transaction, see Note 10, Debt and Other Obligations . The Company had the power, via its 100% ownership through an affiliate, to direct the activities of the VIE, but did not have the obligation to absorb losses related to the primary risks or sources of variability to the VIE. The variability of loss would be borne primarily by the third party in its function as provider of credit enhancement on the Red Mountain Note. Accordingly, it was determined that the Company is not the primary beneficiary of the VIE. The Company’s risk of loss related to the VIE is limited to its investment, through an affiliate, of $10,000 . Additionally, the Company has guaranteed Red Mountain’s payment obligation for the credit enhancement fee to the unrelated third party provider. As of March 31, 2018 , no payments have been made or required related to this guarantee. Steel City, a wholly owned subsidiary of the Company, entered into a financing agreement on January 15, 2016 involving Golden Gate Captive Insurance Company, in which Golden Gate issued non-recourse funding obligations to Steel City and Steel City issued three notes (the “Steel City Notes”) to Golden Gate. Credit enhancement on the Steel City Notes is provided by unrelated third parties. For details of the financing transaction, see Note 10, Debt and Other Obligations . The activity most significant to Steel City is the issuance of the Steel City Notes. The Company had the power, via its 100% ownership, to direct the activities of the VIE, but did not have the obligation to absorb losses related to the primary risks or sources of variability to the VIE. The variability of loss would be borne primarily by the third parties in their function as providers of credit enhancement on the Steel City Notes. Accordingly, it was determined that the Company is not the primary beneficiary of the VIE. The Company’s risk of loss related to the VIE is limited to its investment of $10,000 . Additionally, the Company has guaranteed Steel City’s payment obligation for the credit enhancement fee to the unrelated third party providers. As of March 31, 2018 , no payments have been made or required related to this guarantee.

FAIR VALUE OF FINANCIAL INSTRUM

FAIR VALUE OF FINANCIAL INSTRUMENTS	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
FAIR VALUE OF FINANCIAL INSTRUMENTS	FAIR VALUE OF FINANCIAL INSTRUMENTS The Company determined the fair value of its financial instruments based on the fair value hierarchy established in FASB guidance referenced in the Fair Value Measurements and Disclosures Topic which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The Company has adopted the provisions from the FASB guidance that is referenced in the Fair Value Measurements and Disclosures Topic for non-financial assets and liabilities (such as property and equipment, goodwill, and other intangible assets) that are required to be measured at fair value on a periodic basis. The effect on the Company’s periodic fair value measurements for non-financial assets and liabilities was not material. The Company has categorized its financial instruments, based on the priority of the inputs to the valuation technique, into a three level hierarchy. The fair value hierarchy gives the highest priority to quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). If the inputs used to measure fair value fall within different levels of the hierarchy, the category level is based on the lowest priority level input that is significant to the fair value measurement of the instrument. Financial assets and liabilities recorded at fair value on the consolidated balance sheets are categorized as follows: • Level 1: Unadjusted quoted prices for identical assets or liabilities in an active market. • Level 2: Quoted prices in markets that are not active or significant inputs that are observable either directly or indirectly. Level 2 inputs include the following: a. Quoted prices for similar assets or liabilities in active markets b. Quoted prices for identical or similar assets or liabilities in non-active markets c. Inputs other than quoted market prices that are observable d. Inputs that are derived principally from or corroborated by observable market data through correlation or other means. • Level 3: Prices or valuation techniques that require inputs that are both unobservable and significant to the overall fair value measurement. They reflect management’s own assumptions about the assumptions a market participant would use in pricing the asset or liability. The following table presents the Company’s hierarchy for its assets and liabilities measured at fair value on a recurring basis as of March 31, 2018 : Measurement Category Level 1 Level 2 Level 3 Total (Dollars In Thousands) Assets: Fixed maturity securities - available-for-sale Residential mortgage-backed securities 4 $ — $ 2,394,370 $ — $ 2,394,370 Commercial mortgage-backed securities 4 — 1,841,506 — 1,841,506 Other asset-backed securities 4 — 740,863 503,789 1,244,652 U.S. government-related securities 4 1,041,123 286,677 — 1,327,800 State, municipalities, and political subdivisions 4 — 1,700,279 — 1,700,279 Other government-related securities 4 — 277,459 — 277,459 Corporate securities 4 — 27,933,364 626,409 28,559,773 Redeemable preferred stock 4 72,244 18,325 — 90,569 Total fixed maturity securities - available-for-sale 1,113,367 35,192,843 1,130,198 37,436,408 Fixed maturity securities - trading Residential mortgage-backed securities 3 — 265,547 — 265,547 Commercial mortgage-backed securities 3 — 146,633 — 146,633 Other asset-backed securities 3 — 94,756 34,958 129,714 U.S. government-related securities 3 31,684 5,891 — 37,575 State, municipalities, and political subdivisions 3 — 318,142 — 318,142 Other government-related securities 3 — 40,368 — 40,368 Corporate securities 3 — 1,640,575 5,324 1,645,899 Redeemable preferred stock 3 3,264 — — 3,264 Total fixed maturity securities - trading 34,948 2,511,912 40,282 2,587,142 Total fixed maturity securities 1,148,315 37,704,755 1,170,480 40,023,550 Equity securities 3 615,423 36 66,061 681,520 Other long-term investments (1) 3 & 4 87,558 354,855 144,352 586,765 Short-term investments 3 327,834 113,947 — 441,781 Total investments 2,179,130 38,173,593 1,380,893 41,733,616 Cash 3 307,724 — — 307,724 Other assets 3 34,463 — — 34,463 Assets related to separate accounts Variable annuity 3 13,549,068 — — 13,549,068 Variable universal life 3 1,019,250 — — 1,019,250 Total assets measured at fair value on a recurring basis $ 17,089,635 $ 38,173,593 $ 1,380,893 $ 56,644,121 Liabilities: Annuity account balances (2) 3 $ — $ — $ 81,399 $ 81,399 Other liabilities (1) 3 & 4 7,397 189,206 621,102 817,705 Total liabilities measured at fair value on a recurring basis $ 7,397 $ 189,206 $ 702,501 $ 899,104 (1) Includes certain freestanding and embedded derivatives. (2) Represents liabilities related to fixed indexed annuities. (3) Fair Value through Net Income (4) Fair Value through Other Comprehensive Income The following table presents the Company’s hierarchy for its assets and liabilities measured at fair value on a recurring basis as of December 31, 2017 : Level 1 Level 2 Level 3 Total (Dollars In Thousands) Assets: Fixed maturity securities - available-for-sale Residential mortgage-backed securities $ — $ 2,327,212 $ — $ 2,327,212 Commercial mortgage-backed securities — 1,889,822 — 1,889,822 Other asset-backed securities — 745,184 504,365 1,249,549 U.S. government-related securities 958,775 264,477 — 1,223,252 State, municipalities, and political subdivisions — 1,741,645 — 1,741,645 Other government-related securities — 287,282 — 287,282 Corporate securities — 29,075,109 626,901 29,702,010 Redeemable preferred stock 72,471 18,620 — 91,091 Total fixed maturity securities - available-for-sale 1,031,246 36,349,351 1,131,266 38,511,863 Fixed maturity securities - trading Residential mortgage-backed securities — 259,694 — 259,694 Commercial mortgage-backed securities — 146,804 — 146,804 Other asset-backed securities — 102,875 35,222 138,097 U.S. government-related securities 21,183 6,051 — 27,234 State, municipalities, and political subdivisions — 326,925 — 326,925 Other government-related securities — 63,925 — 63,925 Corporate securities — 1,692,741 5,442 1,698,183 Redeemable preferred stock 3,327 — — 3,327 Total fixed maturity securities - trading 24,510 2,599,015 40,664 2,664,189 Total fixed maturity securities 1,055,756 38,948,366 1,171,930 41,176,052 Equity securities 688,214 36 66,110 754,360 Other long-term investments (1) 51,102 417,969 136,004 605,075 Short-term investments 482,461 132,749 — 615,210 Total investments 2,277,533 39,499,120 1,374,044 43,150,697 Cash 252,310 — — 252,310 Other assets 28,771 — — 28,771 Assets related to separate accounts Variable annuity 13,956,071 — — 13,956,071 Variable universal life 1,035,202 — — 1,035,202 Total assets measured at fair value on a recurring basis $ 17,549,887 $ 39,499,120 $ 1,374,044 $ 58,423,051 Liabilities: Annuity account balances (2) $ — $ — $ 83,472 $ 83,472 Other liabilities (1) 5,755 240,927 760,890 1,007,572 Total liabilities measured at fair value on a recurring basis $ 5,755 $ 240,927 $ 844,362 $ 1,091,044 (1) Includes certain freestanding and embedded derivatives. (2) Represents liabilities related to fixed indexed annuities. Determination of fair values The valuation methodologies used to determine the fair values of assets and liabilities reflect market participant assumptions and are based on the application of the fair value hierarchy that prioritizes observable market inputs over unobservable inputs. The Company determines the fair values of certain financial assets and financial liabilities based on quoted market prices, where available. The Company also determines certain fair values based on future cash flows discounted at the appropriate current market rate. Fair values reflect adjustments for counterparty credit quality, the Company’s credit standing, liquidity, and where appropriate, risk margins on unobservable parameters. The following is a discussion of the methodologies used to determine fair values for the financial instruments as listed in the above table. The fair value of fixed maturity, short-term, and equity securities is determined by management after considering one of three primary sources of information: third party pricing services, non-binding independent broker quotations, or pricing matrices. Security pricing is applied using a "waterfall" approach whereby publicly available prices are first sought from third party pricing services, the remaining unpriced securities are submitted to independent brokers for non-binding prices, or lastly, securities are priced using a pricing matrix. Typical inputs used by these three pricing methods include, but are not limited to: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, and reference data including market research publications. Third party pricing services price approximately 92.4% of the Company's available-for-sale and trading fixed maturity securities. Based on the typical trading volumes and the lack of quoted market prices for available-for-sale and trading fixed maturities, third party pricing services derive the majority of security prices from observable market inputs such as recent reported trades for identical or similar securities making adjustments through the reporting date based upon available market observable information outlined above. If there are no recent reported trades, the third party pricing services and brokers may use matrix or model processes to develop a security price where future cash flow expectations are developed based upon collateral performance and discounted at an estimated market rate. Certain securities are priced via independent non-binding broker quotations, which are considered to have no significant unobservable inputs. When using non-binding independent broker quotations, the Company obtains one quote per security, typically from the broker from which we purchased the security. A pricing matrix is used to price securities for which the Company is unable to obtain or effectively rely on either a price from a third party pricing service or an independent broker quotation. The pricing matrix used by the Company begins with current spread levels to determine the market price for the security. The credit spreads, assigned by brokers, incorporate the issuer’s credit rating, liquidity discounts, weighted- average of contracted cash flows, risk premium, if warranted, due to the issuer’s industry, and the security’s time to maturity. The Company uses credit ratings provided by nationally recognized rating agencies. For securities that are priced via non-binding independent broker quotations, the Company assesses whether prices received from independent brokers represent a reasonable estimate of fair value through an analysis using internal and external cash flow models developed based on spreads and, when available, market indices. The Company uses a market-based cash flow analysis to validate the reasonableness of prices received from independent brokers. These analytics, which are updated daily, incorporate various metrics (yield curves, credit spreads, prepayment rates, etc.) to determine the valuation of such holdings. As a result of this analysis, if the Company determines there is a more appropriate fair value based upon the analytics, the price received from the independent broker is adjusted accordingly. The Company did not adjust any quotes or prices received from brokers during the three months ended March 31, 2018 . The Company has analyzed the third party pricing services’ valuation methodologies and related inputs and has also evaluated the various types of securities in its investment portfolio to determine an appropriate fair value hierarchy level based upon trading activity and the observability of market inputs that is in accordance with the Fair Value Measurements and Disclosures Topic of the ASC. Based on this evaluation and investment class analysis, each price was classified into Level 1, 2, or 3. Most prices provided by third party pricing services are classified into Level 2 because the significant inputs used in pricing the securities are market observable and the observable inputs are corroborated by the Company. Since the matrix pricing of certain debt securities includes significant non-observable inputs, they are classified as Level 3. Asset-Backed Securities This category mainly consists of residential mortgage-backed securities, commercial mortgage-backed securities, and other asset-backed securities (collectively referred to as asset-backed securities or “ABS”). As of March 31, 2018 , the Company held $5.5 billion of ABS classified as Level 2. These securities are priced from information provided by a third party pricing service and independent broker quotes. The third party pricing services and brokers mainly value securities using both a market and income approach to valuation. As part of this valuation process they consider the following characteristics of the item being measured to be relevant inputs: 1) weighted-average coupon rate, 2) weighted-average years to maturity, 3) types of underlying assets, 4) weighted-average coupon rate of the underlying assets, 5) weighted-average years to maturity of the underlying assets, 6) seniority level of the tranches owned, and 7) credit ratings of the securities. After reviewing these characteristics of the ABS, the third party pricing service and brokers use certain inputs to determine the value of the security. For ABS classified as Level 2, the valuation would consist of predominantly market observable inputs such as, but not limited to: 1) monthly principal and interest payments on the underlying assets, 2) average life of the security, 3) prepayment speeds, 4) credit spreads, 5) treasury and swap yield curves, and 6) discount margin. The Company reviews the methodologies and valuation techniques (including the ability to observe inputs) in assessing the information received from external pricing services and in consideration of the fair value presentation. As of March 31, 2018 , the Company held $538.7 million of Level 3 ABS, which included $503.7 million of other asset-backed securities classified as available-for-sale and $35.0 million of other asset-backed securities classified as trading. These securities are predominantly ARS whose underlying collateral is at least 97% guaranteed by the FFELP. The Company prices its ARS using an income approach valuation model. As part of the valuation process the Company reviews the following characteristics of the ARS in determining the relevant inputs: 1) weighted-average coupon rate, 2) weighted-average years to maturity, 3) types of underlying assets, 4) weighted-average coupon rate of the underlying assets, 5) weighted-average years to maturity of the underlying assets, 6) seniority level of the tranches owned, 7) credit ratings of the securities, 8) liquidity premium, and 9) paydown rate. In periods where market activity increases and there are transactions at a price that is not the result of a distressed or forced sale we consider those prices as part of our valuation. If the market activity during a period is solely the result of the issuer redeeming positions we consider those transactions in our valuation, but still consider them to be level three measurements due to the nature of the transaction. Corporate Securities, U.S. Government-Related Securities, States, Municipals, and Political Subdivisions, and Other Government Related Securities As of March 31, 2018 , the Company classified approximately $32.2 billion of corporate securities, U.S. government-related securities, states, municipals, and political subdivisions, and other government-related securities as Level 2. The fair value of the Level 2 securities is predominantly priced by broker quotes and a third party pricing service. The Company has reviewed the valuation techniques of the brokers and third party pricing service and has determined that such techniques used Level 2 market observable inputs. The following characteristics of the securities are considered to be the primary relevant inputs to the valuation: 1) weighted- average coupon rate, 2) weighted-average years to maturity, 3) seniority, and 4) credit ratings. The Company reviews the methodologies and valuation techniques (including the ability to observe inputs) in assessing the information received from external pricing services and in consideration of the fair value presentation. The brokers and third party pricing service utilize valuation models that consist of a hybrid income and market approach to valuation. The pricing models utilize the following inputs: 1) principal and interest payments, 2) treasury yield curve, 3) credit spreads from new issue and secondary trading markets, 4) dealer quotes with adjustments for issues with early redemption features, 5) liquidity premiums present on private placements, and 6) discount margins from dealers in the new issue market. As of March 31, 2018 , the Company classified approximately $631.7 million of securities as Level 3 valuations. Level 3 securities primarily represent investments in illiquid bonds for which no price is readily available. To determine a price, the Company uses a discounted cash flow model with both observable and unobservable inputs. These inputs are entered into an industry standard pricing model to determine the final price of the security. These inputs include: 1) principal and interest payments, 2) coupon rate, 3) sector and issuer level spread over treasury, 4) underlying collateral, 5) credit ratings, 6) maturity, 7) embedded options, 8) recent new issuance, 9) comparative bond analysis, and 10) an illiquidity premium. Equities As of March 31, 2018 , the Company held approximately $66.1 million of equity securities classified as Level 2 and Level 3. Of this total, $65.5 million represents Federal Home Loan Bank (“FHLB”) stock. The Company believes that the cost of the FHLB stock approximates fair value. Other Long-term Investments and Other Liabilities Other long-term investments and other liabilities consist entirely of free-standing and embedded derivative financial instruments. Refer to Note 6, Derivative Financial Instruments for additional information related to derivatives. Derivative financial instruments are valued using exchange prices, independent broker quotations, or pricing valuation models, which utilize market data inputs. Excluding embedded derivatives, as of March 31, 2018 , 100% of derivatives based upon notional values were priced using exchange prices or independent broker quotations. Inputs used to value derivatives include, but are not limited to, interest swap rates, credit spreads, interest rate and equity market volatility indices, equity index levels, and treasury rates. The Company performs monthly analysis on derivative valuations that includes both quantitative and qualitative analyses. Derivative instruments classified as Level 1 generally include futures and options, which are traded on active exchange markets. Derivative instruments classified as Level 2 primarily include swaps, options, and swaptions, which are traded over-the-counter. Level 2 also includes certain centrally cleared derivatives. These derivative valuations are determined using independent broker quotations, which are corroborated with observable market inputs. Derivative instruments classified as Level 3 were embedded derivatives and include at least one significant non-observable input. A derivative instrument containing Level 1 and Level 2 inputs will be classified as a Level 3 financial instrument in its entirety if it has at least one significant Level 3 input. The Company utilizes derivative instruments to manage the risk associated with certain assets and liabilities. However, the derivative instruments may not be classified within the same fair value hierarchy level as the associated assets and liabilities. Therefore, the changes in fair value on derivatives reported in Level 3 may not reflect the offsetting impact of the changes in fair value of the associated assets and liabilities. The embedded derivatives are carried at fair value in “other long-term investments” and “other liabilities” on the Company’s consolidated condensed balance sheet. The changes in fair value are recorded in earnings as “Realized investment gains (losses) - Derivative financial instruments”. Refer to Note 6, Derivative Financial Instruments for more information related to each embedded derivatives gains and losses. The fair value of the guaranteed living withdrawal benefits ("GLWB") embedded derivative is derived through the income method of valuation using a valuation model that projects future cash flows using multiple risk neutral stochastic equity scenarios and policyholder behavior assumptions. The risk neutral scenarios are generated using the current swap curve and projected equity volatilities and correlations. The projected equity volatilities are based on a blend of historical volatility and near- term equity market implied volatilities. The equity correlations are based on historical price observations. For policyholder behavior assumptions, expected lapse and utilization assumptions are used and updated for actual experience, as necessary. The Company assumes age-based mortality from the Ruark 2015 ALB table with attained age factors varying from 91.1% - 106.6% . The present value of the cash flows is determined using the discount rate curve, which is based upon LIBOR plus a credit spread (to represent the Company’s non-performance risk). As a result of using significant unobservable inputs, the GLWB embedded derivative is categorized as Level 3. Policyholder assumptions are reviewed on an annual basis. The balance of the FIA embedded derivative is impacted by policyholder cash flows associated with the FIA product that are allocated to the embedded derivative in addition to changes in the fair value of the embedded derivative during the reporting period. The fair value of the FIA embedded derivative is derived through the income method of valuation using a valuation model that projects future cash flows using current index values and volatility, the hedge budget used to price the product, and policyholder assumptions (both elective and non-elective). For policyholder behavior assumptions, expected lapse and withdrawal assumptions are used and updated for actual experience, as necessary. The Company assumes age-based mortality from the 1994 Variable Annuity MGDB mortality table modified with company experience, with attained age factors varying from 46% - 113% . The present value of the cash flows is determined using the discount rate curve, which is based upon LIBOR up to one year and constant maturity treasury rates plus a credit spread (to represent the Company's non-performance risk) thereafter. Policyholder assumptions are reviewed on an annual basis. As a result of using significant unobservable inputs, the FIA embedded derivative is categorized as Level 3. The balance of the indexed universal life (“IUL”) embedded derivative is impacted by policyholder cash flows associated with the IUL product that are allocated to the embedded derivative in addition to changes in the fair value of the embedded derivative during the reporting period. The fair value of the IUL embedded derivative is derived through the income method of valuation using a valuation model that projects future cash flows using current index values and volatility, the hedge budget used to price the product, and policyholder assumptions (both elective and non-elective). For policyholder behavior assumptions, expected lapse and withdrawal assumptions are used and updated for actual experience, as necessary. The Company assumes age-based mortality from the SOA 2015 VBT Primary Tables modified with company experience, with attained age factors varying from 34% - 152% . The present value of the cash flows is determined using the discount rate curve, which is based upon LIBOR up to one year and constant maturity treasury rates plus a credit spread (to represent the Company's non-performance risk) thereafter. Policyholder assumptions are reviewed on an annual basis. As a result of using significant unobservable inputs, the IUL embedded derivative is categorized as Level 3. The Company has assumed and ceded certain blocks of policies under modified coinsurance agreements in which the investment results of the underlying portfolios inure directly to the reinsurers. As a result, these agreements contain embedded derivatives that are reported at fair value. Changes in their fair value are reported in earnings. The investments supporting these agreements are designated as “trading securities”; therefore changes in their fair value are also reported in earnings. As of March 31, 2018 , the fair value of the embedded derivative is based upon the relationship between the statutory policy liabilities (net of policy loans) of $2.4 billion and the statutory unrealized gain (loss) of the securities of $134.1 million . As a result, changes in the fair value of the embedded derivatives are largely offset by the changes in fair value of the related investments and each are reported in earnings. The fair value of the embedded derivative is considered a Level 3 valuation due to the unobservable nature of the policy liabilities. Annuity Account Balances The Company records a certain legacy block of FIA reserves at fair value. Based on the characteristics of these reserves, the Company believes that the fund value approximates fair value. The fair value measurement of these reserves is considered a Level 3 valuation due to the unobservable nature of the fund values. The Level 3 fair value as of March 31, 2018 is $81.4 million . Separate Accounts Separate account assets are invested in open-ended mutual funds and are included in Level 1. Valuation of Level 3 Financial Instruments The following table presents the valuation method for material financial instruments included in Level 3, as well as the unobservable inputs used in the valuation of those financial instruments: Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars In Thousands) Assets: Other asset-backed securities $ 503,672 Liquidation Liquidation value $90 - $97 ($94.92) Discounted cash flow Liquidity premium 0.07% - 1.09% (0.73%) Paydown rate 11.63% - 12.53% (12.16%) Corporate securities 617,724 Discounted cash flow Spread over treasury 0.96% - 4.35% (1.61%) Liabilities: (1) Embedded derivatives - GLWB (2) $ 55,468 Actuarial cash flow model Mortality 91.1% to 106.6% of Ruark 2015 ALB table Lapse 0.3% - 15%, depending on product/duration/funded status of guarantee Utilization 99%. 10% of policies have a one- time over-utilization of 400% Nonperformance risk 0.14% - 0.95% Embedded derivative - FIA 218,340 Actuarial cash flow model Expenses $146 per policy Withdrawal rate 1.5% prior to age 70, 100% of the RMD for ages 70+ Mortality 1994 MGDB table with company experience Lapse 1.0% - 30.0%, depending on duration/surrender charge period Nonperformance risk 0.14% - 0.95% Embedded derivative - IUL 77,350 Actuarial cash flow model Mortality 34% - 152% of 2015 VBT Primary Tables Lapse 0.5% - 10.0%, depending on duration/distribution channel and smoking class Nonperformance risk 0.14% - 0.95% (1) Excludes modified coinsurance arrangements. (2) The fair value for the GLWB embedded derivative is presented as a net liability. The chart above excludes Level 3 financial instruments that are valued using broker quotes and for which book value approximates fair value. The Company has considered all reasonably available quantitative inputs as of March 31, 2018 , but the valuation techniques and inputs used by some brokers in pricing certain financial instruments are not shared with the Company. This resulted in $49.5 million of financial instruments being classified as Level 3 as of March 31, 2018 . Of the $49.5 million , $35.1 million are other asset-backed securities, $14.0 million are corporate securities, and $0.4 million are equity securities. In certain cases, the Company has determined that book value materially approximates fair value. As of March 31, 2018 , the Company held $65.7 million of financial instruments where book value approximates fair value which was predominantly FHLB stock. The following table presents the valuation method for material financial instruments included in Level 3, as well as the unobservable inputs used in the valuation of those financial instruments: Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars In Thousands) Assets: Other asset-backed securities $ 504,228 Liquidation Liquidation value $90 - $97 ($94.91) Discounted Cash Flow Liquidity premium 0.06% - 1.17% (0.75%) Paydown rate 11.31% - 11.97% (11.54%) Corporate securities 617,770 Discounted cash flow Spread over treasury 0.81% - 3.95% (1.06%) Liabilities: (1) Embedded derivatives - GLWB (2) $ 111,760 Actuarial cash flow model Mortality 91.1% to 106.6% of Ruark 2015 ALB table Lapse 1.0% - 30.0%, depending on product/duration/funded status of guarantee Utilization 99%. 10% of policies have a one- time over-utilization of 400% Nonperformance risk 0.11% - 0.79% Embedded derivative - FIA 218,676 Actuarial cash flow model Expenses $146 per policy Withdrawal rate 1.5% prior to age 70, 100% of the RMD for ages 70+ Mortality 1994 MGDB table with company experience Lapse 1.0% - 30.0%, depending on duration/surrender charge period Nonperformance risk 0.11% - 0.79% Embedded derivative - IUL 80,212 Actuarial cash flow model Mortality 34% - 152% of 2015 VBT Primary Tables Lapse 0.5% - 10.0%, depending on duration/distribution channel and smoking class Nonperformance risk 0.11% - 0.79% (1) Excludes modified coinsurance arrangements. (2) The fair value for the GLWB embedded derivative is presented as a net liability. The chart above excludes Level 3 financial instruments that are valued using broker quotes and for which book value approximates fair value. The Company had considered all reasonably available quantitative inputs as of December 31, 2017 , but the valuation techniques and inputs used by some brokers in pricing certain financial instruments are not shared with the Company. This resulted in $50.4 million of financial instruments being classified as Level 3 as of December 31, 2017 . Of the $50.4 million , $35.4 million are other asset-backed securities, $14.6 million are corporate securities, and $0.4 million are equity securities. In certain cases the Company has determined that book value materially approximates fair value. As of December 31, 2017 , the Company held $65.7 million of financial instruments where book value approximates fair value which was predominantly FHLB stock. The asset-backed securities classified as Level 3 are predominantly ARS. A change in the paydown rate (the projected annual rate of principal reduction) of the ARS can significantly impact the fair value of these securities. A decrease in the paydown rate would increase the projected weighted average life of the ARS and increase the sensitivity of the ARS’ fair value to changes in interest rates. An increase in the liquidity premium would result in a decrease in the fair value of the securities, while a decrease in the liquidity premium would increase the fair value of these securities. The liquidation value for these securities are sensitive to the issuer's available cash flows and ability to redeem the securities, as well as the current holders' willingness to liquidate at the specified price. The fair value of corporate bonds classified as Level 3 is sensitive to changes in the interest rate spread over the corresponding U.S. Treasury rate. This spread represents a risk premium that is impacted by company specific and market factors. An increase in the spread can be caused by a perceived increase in credit risk of a specific issuer and/or an increase in the overall market risk premium associated with similar securities. The fair values of corporate bonds are sensitive to changes in spread. When holding the treasury rate constant, the fair value of corporate bonds increases when spreads decrease, and decreases when spreads increase. The fair value of the GLWB embedded derivative is sensitive to changes in the discount rate which includes the Company’s nonperformance risk, volatility, lapse, and mortality assumptions. The volatility assumption is an observable input as it is based on market inputs. The Company’s nonperformance risk, lapse, and mortality are unobservable. An increase in the three unobservable a

DERIVATIVE FINANCIAL INSTRUMENT

DERIVATIVE FINANCIAL INSTRUMENTS	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE FINANCIAL INSTRUMENTS	DERIVATIVE FINANCIAL INSTRUMENTS Types of Derivative Instruments and Derivative Strategies The Company utilizes a risk management strategy that incorporates the use of derivative financial instruments to reduce exposure to certain risks, including but not limited to, interest rate risk, currency exchange risk, volatility risk, and equity market risk. These strategies are developed through the Company’s analysis of data from financial simulation models and other internal and industry sources, and are then incorporated into the Company’s risk management program. Derivative instruments expose the Company to credit and market risk and could result in material changes from period to period. The Company attempts to minimize its credit risk by entering into transactions with highly rated counterparties. The Company manages the market risk by establishing and monitoring limits as to the types and degrees of risk that may be undertaken. The Company monitors its use of derivatives in connection with its overall asset/liability management programs and risk management strategies. In addition, all derivative programs are monitored by our risk management department. Derivatives Related to Interest Rate Risk Management Derivative instruments that are used as part of the Company’s interest rate risk management strategy include interest rate swaps, interest rate futures, interest rate caps, and interest rate swaptions. Derivatives Related to Foreign Currency Exchange Risk Management Derivative instruments that are used as part of the Company’s foreign currency exchange risk management strategy include foreign currency swaps, foreign currency futures, foreign equity futures, and foreign equity options. Derivatives Related to Risk Mitigation of Certain Annuity Contracts The Company may use the following types of derivative contracts to mitigate its exposure to certain guaranteed benefits related to VA contracts and fixed indexed annuities: • Foreign Currency Futures • Variance Swaps • Interest Rate Futures • Equity Options • Equity Futures • Credit Derivatives • Interest Rate Swaps • Interest Rate Swaptions • Volatility Futures • Volatility Options • Total Return Swaps Accounting for Derivative Instruments The Company records its derivative financial instruments in the consolidated balance sheet in “other long-term investments” and “other liabilities” in accordance with GAAP, which requires that all derivative instruments be recognized in the balance sheet at fair value. The change in the fair value of derivative financial instruments is reported either in the statement of income or in other comprehensive income (loss), depending upon whether it qualified for and also has been properly identified as being part of a hedging relationship, and also on the type of hedging relationship that exists. For a derivative financial instrument to be accounted for as an accounting hedge, it must be identified and documented as such on the date of designation. For cash flow hedges, the effective portion of their realized gain or loss is reported as a component of other comprehensive income and reclassified into earnings in the same period during which the hedged item impacts earnings. Any remaining gain or loss, the ineffective portion, is recognized in current earnings. For fair value hedge derivatives, their gain or loss as well as the offsetting loss or gain attributable to the hedged risk of the hedged item is recognized in current earnings. Effectiveness of the Company’s hedge relationships is assessed on a quarterly basis. The Company reports changes in fair values of derivatives that are not part of a qualifying hedge relationship through earnings in the period of change. Changes in the fair value of derivatives that are recognized in current earnings are reported in “Realized investment gains (losses)-Derivative financial instruments”. Derivative Instruments Designated and Qualifying as Hedging Instruments Cash-Flow Hedges • To hedge a fixed rate note denominated in a foreign currency, the Company entered into a fixed-to-fixed foreign currency swap in order to hedge the foreign currency exchange risk associated with the note. The cash flows received on the swap are identical to the cash flow paid on the note. Derivative Instruments Not Designated and Not Qualifying as Hedging Instruments The Company uses various other derivative instruments for risk management purposes that do not qualify for hedge accounting treatment. Changes in the fair value of these derivatives are recognized in earnings during the period of change. Derivatives Related to Variable Annuity Contracts • The Company uses equity futures, equity options, total return swaps, interest rate futures, interest rate swaps, interest rate swaptions, currency futures, volatility futures, volatility options, and variance swaps to mitigate the risk related to certain guaranteed minimum benefits, including GLWB, within its VA products. In general, the cost of such benefits varies with the level of equity and interest rate markets, foreign currency levels, and overall volatility. • The Company markets certain VA products with a GLWB rider. The GLWB component is considered an embedded derivative, not considered to be clearly and closely related to the host contract. Derivatives Related to Fixed Annuity Contracts • The Company uses equity futures and options to mitigate the risk within its fixed indexed annuity products. In general, the cost of such benefits varies with the level of equity markets and overall volatility. • The Company markets certain fixed indexed annuity products. The FIA component is considered an embedded derivative as it is, not considered to be clearly and closely related to the host contract. Derivatives Related to Indexed Universal Life Contracts • The Company uses equity futures and options to mitigate the risk within its indexed universal life products. In general, the cost of such benefits varies with the level of equity markets. • The Company markets certain IUL products. The IUL component is considered an embedded derivative as it is, not considered to be clearly and closely related to the host contract. Other Derivatives • The Company uses various swaps and other types of derivatives to manage risk related to other exposures. • The Company is involved in various modified coinsurance and funds withheld arrangements which contain embedded derivatives. Changes in their fair value are recorded in current period earnings. The investment portfolios that support the related modified coinsurance reserves and funds withheld arrangements had fair value changes which substantially offset the gains or losses on these embedded derivatives. The following table sets forth realized investments gains and losses for the periods shown: Realized investment gains (losses) - derivative financial instruments For The 2018 2017 (Dollars In Thousands) Derivatives related to VA contracts: Interest rate futures - VA $ (16,892 ) $ 3,448 Equity futures - VA (6,428 ) (30,817 ) Currency futures - VA (7,583 ) (6,256 ) Equity options - VA 12,016 (40,185 ) Interest rate swaptions - VA (14 ) (1,469 ) Interest rate swaps - VA (63,710 ) (8,957 ) Total return swaps - VA 6,490 — Embedded derivative - GLWB 56,292 33,632 Total derivatives related to VA contracts (19,829 ) (50,604 ) Derivatives related to FIA contracts: Embedded derivative - FIA 11,330 (12,411 ) Equity futures - FIA (161 ) 297 Equity options - FIA (4,669 ) 10,700 Total derivatives related to FIA contracts 6,500 (1,414 ) Derivatives related to IUL contracts: Embedded derivative - IUL 9,884 (2,090 ) Equity futures - IUL 136 (799 ) Equity options - IUL (1,250 ) 2,891 Total derivatives related to IUL contracts 8,770 2 Embedded derivative - Modco reinsurance treaties 82,658 (17,865 ) Other derivatives (40 ) 3 Total realized gains (losses) - derivatives $ 78,059 $ (69,878 ) The following table presents the components of the gain or loss on derivatives that qualify as a cash flow hedging relationship. Gain (Loss) on Derivatives in Cash Flow Hedging Relationship Amount of Gains (Losses) Deferred in Accumulated Other Comprehensive Income (Loss) on Derivatives Amount and Location of Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss) Amount and Location of (Losses) Recognized in Income (Loss) on Derivatives (Effective Portion) (Effective Portion) (Ineffective Portion) Benefits and settlement Realized investment expenses gains (losses) (Dollars In Thousands) For The Three Months Ended March 31, 2018 Foreign currency swaps $ 615 $ (113 ) $ — Total $ 615 $ (113 ) $ — For The Three Months Ended March 31, 2017 Foreign currency swaps $ (1,034 ) $ (205 ) $ — Total $ (1,034 ) $ (205 ) $ — Based on expected cash flows of the underlying hedged items, the Company expects to reclassify $0.4 million out of accumulated other comprehensive income into earnings during the next twelve months. The table below presents information about the nature and accounting treatment of the Company’s primary derivative financial instruments and the location in and effect on the consolidated condensed financial statements for the periods presented below: As of March 31, 2018 December 31, 2017 Notional Amount Fair Value Notional Amount Fair Value (Dollars In Thousands) Other long-term investments Cash flow hedges: Foreign currency swaps $ 117,178 $ 12,131 $ 117,178 $ 6,016 Derivatives not designated as hedging instruments: Interest rate swaps 1,065,000 25,943 1,265,000 55,411 Total return swaps 448,872 18,678 190,938 135 Embedded derivative - Modco reinsurance treaties 64,798 497 64,472 1,009 Embedded derivative - GLWB 5,264,710 143,855 4,897,069 134,995 Interest rate futures 375,718 8,059 1,071,870 3,178 Equity futures 272,807 11,218 62,266 154 Currency futures 150,801 1,127 1,117 2 Equity options 5,168,294 365,097 4,436,467 403,961 Interest rate swaptions 225,000 — 225,000 14 Other 157 160 157 200 $ 13,153,335 $ 586,765 $ 12,331,534 $ 605,075 Other liabilities Derivatives not designated as hedging instruments: Interest rate swaps $ 997,500 $ 12,157 $ 597,500 $ 2,960 Total return swaps — — 243,388 318 Embedded derivative - Modco reinsurance treaties 2,375,807 126,090 2,390,539 215,247 Embedded derivative - GLWB 4,378,592 199,322 4,718,311 246,755 Embedded derivative - FIA 2,109,420 218,340 1,951,650 218,676 Embedded derivative - IUL 186,173 77,350 168,349 80,212 Interest rate futures 872,564 4,630 230,404 917 Equity futures 95,918 1,288 318,795 2,593 Currency futures 95,062 971 255,248 2,087 Equity options 3,623,922 177,557 3,112,812 237,807 $ 14,734,958 $ 817,705 $ 13,986,996 $ 1,007,572

OFFSETTING OF ASSETS AND LIABIL

OFFSETTING OF ASSETS AND LIABILITIES	3 Months Ended
	Mar. 31, 2018
Offsetting [Abstract]
OFFSETTING OF ASSETS AND LIABILITIES	OFFSETTING OF ASSETS AND LIABILITIES Certain of the Company's derivative instruments are subject to enforceable master netting arrangements that provide for the net settlement of all derivative contracts between the Company and a counterparty in the event of default or upon the occurrence of certain termination events. Collateral support agreements associated with each master netting arrangement provide that the Company will receive or pledge financial collateral in the event either minimum thresholds, or in certain cases ratings levels, have been reached. Additionally, certain of the Company's repurchase agreements provide for net settlement on termination of the agreement. Refer to Note 10, Debt and Other Obligations for details of the Company’s repurchase agreement programs. The tables below present the derivative instruments by assets and liabilities for the Company as of March 31, 2018 : Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Financial Instruments Collateral Received Net Amount (Dollars In Thousands) Offsetting of Assets Derivatives: Free-Standing derivatives $ 442,253 $ — $ 442,253 $ 194,876 $ 126,320 $ 121,057 Total derivatives, subject to a master netting arrangement or similar arrangement 442,253 — 442,253 194,876 126,320 121,057 Derivatives not subject to a master netting arrangement or similar arrangement Embedded derivative - Modco reinsurance treaties 497 — 497 — — 497 Embedded derivative - GLWB 143,855 — 143,855 — — 143,855 Other 160 — 160 — — 160 Total derivatives, not subject to a master netting arrangement or similar arrangement 144,512 — 144,512 — — 144,512 Total derivatives 586,765 — 586,765 194,876 126,320 265,569 Total Assets $ 586,765 $ — $ 586,765 $ 194,876 $ 126,320 $ 265,569 Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Position Net Amounts of Liabilities Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Financial Instruments Collateral Posted Net Amount (Dollars In Thousands) Offsetting of Liabilities Derivatives: Free-Standing derivatives $ 196,603 $ — $ 196,603 $ 194,876 $ 1,727 $ — Total derivatives, subject to a master netting arrangement or similar arrangement 196,603 — 196,603 194,876 1,727 — Derivatives not subject to a master netting arrangement or similar arrangement Embedded derivative - Modco reinsurance treaties 126,090 — 126,090 — — 126,090 Embedded derivative - GLWB 199,322 — 199,322 — — 199,322 Embedded derivative - FIA 218,340 — 218,340 — — 218,340 Embedded derivative - IUL 77,350 — 77,350 — — 77,350 Total derivatives, not subject to a master netting arrangement or similar arrangement 621,102 — 621,102 — — 621,102 Total derivatives 817,705 — 817,705 194,876 1,727 621,102 Repurchase agreements (1) 665,000 — 665,000 — — 665,000 Total Liabilities $ 1,482,705 $ — $ 1,482,705 $ 194,876 $ 1,727 $ 1,286,102 (1) Borrowings under repurchase agreements are for a term less than 90 days. The tables below present the derivative instruments by assets and liabilities for the Company as of December 31, 2017 : Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Financial Instruments Collateral Received Net Amount (Dollars In Thousands) Offsetting of Assets Derivatives: Free-Standing derivatives $ 468,871 $ — $ 468,871 $ 242,105 $ 108,830 $ 117,936 Total derivatives, subject to a master netting arrangement or similar arrangement 468,871 — 468,871 242,105 108,830 117,936 Derivatives not subject to a master netting arrangement or similar arrangement Embedded derivative - Modco reinsurance treaties 1,009 — 1,009 — — 1,009 Embedded derivative - GLWB 134,995 — 134,995 — — 134,995 Other 200 — 200 — — 200 Total derivatives, not subject to a master netting arrangement or similar arrangement 136,204 — 136,204 — — 136,204 Total derivatives 605,075 — 605,075 242,105 108,830 254,140 Total Assets $ 605,075 $ — $ 605,075 $ 242,105 $ 108,830 $ 254,140 Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Position Net Amounts of Liabilities Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Financial Instruments Collateral Posted Net Amount (Dollars In Thousands) Offsetting of Liabilities Derivatives: Free-Standing derivatives $ 246,682 $ — $ 246,682 $ 242,105 $ 4,577 $ — Total derivatives, subject to a master netting arrangement or similar arrangement 246,682 — 246,682 242,105 4,577 — Derivatives not subject to a master netting arrangement or similar arrangement Embedded derivative - Modco reinsurance treaties 215,247 — 215,247 — — 215,247 Embedded derivative - GLWB 246,755 — 246,755 — — 246,755 Embedded derivative - FIA 218,676 — 218,676 — — 218,676 Embedded derivative - IUL 80,212 — 80,212 — — 80,212 Total derivatives, not subject to a master netting arrangement or similar arrangement 760,890 — 760,890 — — 760,890 Total derivatives 1,007,572 — 1,007,572 242,105 4,577 760,890 Repurchase agreements (1) 885,000 — 885,000 — — 885,000 Total Liabilities $ 1,892,572 $ — $ 1,892,572 $ 242,105 $ 4,577 $ 1,645,890 (1) Borrowings under repurchase agreements are for a term less than 90 days.

MORTGAGE LOANS

MORTGAGE LOANS	3 Months Ended
	Mar. 31, 2018
MORTGAGE LOANS
MORTGAGE LOANS	MORTGAGE LOANS Mortgage Loans The Company invests a portion of its investment portfolio in commercial mortgage loans. As of March 31, 2018 , the Company’s mortgage loan holdings were approximately $6.8 billion . The Company has specialized in making loans on credit-oriented commercial properties, credit-anchored strip shopping centers, senior living facilities, and apartments. The Company’s underwriting procedures relative to its commercial loan portfolio are based, in the Company’s view, on a conservative and disciplined approach. The Company concentrates on a small number of commercial real estate asset types associated with the necessities of life (retail, multi-family, senior living, professional office buildings, and warehouses). The Company believes that these asset types tend to weather economic downturns better than other commercial asset classes in which it has chosen not to participate. The Company believes this disciplined approach has helped to maintain a relatively low delinquency and foreclosure rate throughout its history. The majority of the Company's mortgage loans portfolio was underwritten by the Company. From time to time, the Company may acquire loans in conjunction with an acquisition. The Company's commercial mortgage loans are stated at unpaid principal balance, adjusted for any unamortized premium or discount, and net of valuation allowances. Interest income is accrued on the principal amount of the loan based on the loan's contractual interest rate. Amortization of premiums and discounts is recorded using the effective yield method. Interest income, amortization of premiums and discounts and prepayment fees are reported in net investment income. Certain of the mortgage loans have call options that occur within the next 12 years. However, if interest rates were to significantly increase, the Company may be unable to exercise the call options on its existing mortgage loans commensurate with the significantly increased market rates. As of March 31, 2018 , assuming the loans are called at their next call dates, approximately $143.6 million of principal would become due for the remainder of 2018 , $873.1 million in 2019 through 2023 , $105.0 million in 2024 through 2028 , and $2.0 million thereafter. The Company offers a type of commercial mortgage loan under which the Company will permit a loan-to-value ratio of up to 85% in exchange for a participating interest in the cash flows from the underlying real estate. As of March 31, 2018 and December 31, 2017 , approximately $672.1 million and $669.3 million , respectively, of the Company’s total mortgage loans principal balance have this participation feature. Cash flows received as a result of this participation feature are recorded as interest income. During the three months ended March 31, 2018 and 2017, the Company recognized $7.3 million and $6.8 million , respectively, of participating mortgage loan income. As of March 31, 2018 , none of the Company's invested assets consisted of nonperforming mortgage loans, restructured mortgage loans, or mortgage loans that were foreclosed and were converted to real estate properties. For all mortgage loans, the impact of troubled debt restructurings is generally reflected in our investment balance and in the allowance for mortgage loan credit losses. During the three months ended March 31, 2018 , the Company recognized no troubled debt restructurings and the Company did not identify any loans whose principal was permanently impaired. The Company’s mortgage loan portfolio consists of two categories of loans: 1) those not subject to a pooling and servicing agreement and 2) those subject to a contractual pooling and servicing agreement. As of March 31, 2018 , the Company did not have mortgage loans not subject to a pooling and servicing agreement that were nonperforming mortgage loans, restructured, or mortgage loans that were foreclosed and were converted to real estate properties. The Company did not foreclose on any nonperforming loans not subject to a pooling and servicing agreement during the three months ended March 31, 2018 . As of March 31, 2018 , none of the loans subject to a pooling and servicing agreement were nonperforming or restructured. The Company did not foreclose on any nonperforming loans subject to a pooling and servicing agreement during the three months ended March 31, 2018 . As of March 31, 2018 and December 31, 2017, there were no allowances for mortgage loan credit losses. Due to the Company’s loss experience and nature of the loan portfolio, the Company believes that a collectively evaluated allowance would be inappropriate. The Company believes an allowance calculated through an analysis of specific loans that are believed to have a higher risk of credit impairment provides a more accurate presentation of expected losses in the portfolio and is consistent with the applicable guidance for loan impairments in ASC Subtopic 310. Since the Company uses the specific identification method for calculating the allowance, it is necessary to review the economic situation of each borrower to determine those that have higher risk of credit impairment. The Company has a team of professionals that monitors borrower conditions such as payment practices, borrower credit, operating performance, and property conditions, as well as ensuring the timely payment of property taxes and insurance. Through this monitoring process, the Company assesses the risk of each loan. When issues are identified, the severity of the issues are assessed and reviewed for possible credit impairment. If a loss is probable, an expected loss calculation is performed and an allowance is established for that loan based on the expected loss. The expected loss is calculated as the excess carrying value of a loan over either the present value of expected future cash flows discounted at the loan’s original effective interest rate, or the current estimated fair value of the loan’s underlying collateral. A loan may be subsequently charged off at such point that the Company no longer expects to receive cash payments, the present value of future expected payments of the renegotiated loan is less than the current principal balance, or at such time that the Company is party to foreclosure or bankruptcy proceedings associated with the borrower and does not expect to recover the principal balance of the loan. A charge off is recorded by eliminating the allowance against the mortgage loan and recording the renegotiated loan or the collateral property related to the loan as investment real estate on the balance sheet, which is carried at the lower of the appraised fair value of the property or the unpaid principal balance of the loan, less estimated selling costs associated with the property. The Company did not have any charge offs or recovery for the three months ended March 31, 2018. It is the Company’s policy to cease to carry accrued interest on loans that are over 90 days delinquent. For loans less than 90 days delinquent, interest is accrued unless it is determined that the accrued interest is not collectible. If a loan becomes over 90 days delinquent, it is the Company’s general policy to initiate foreclosure proceedings unless a workout arrangement to bring the loan current is in place. For loans subject to a pooling and servicing agreement, there are certain additional restrictions and/or requirements related to workout proceedings, and as such, these loans may have different attributes and/or circumstances affecting the status of delinquency or categorization of those in nonperforming status. An analysis of the delinquent loans is shown in the following chart. Greater 30-59 Days 60-89 Days than 90 Days Total As of March 31, 2018 Delinquent Delinquent Delinquent Delinquent (Dollars In Thousands) Commercial mortgage loans $ 814 $ — $ — $ 814 Number of delinquent commercial mortgage loans 1 — — 1 As of December 31, 2017 Commercial mortgage loans $ 1,817 $ — $ — $ 1,817 Number of delinquent commercial mortgage loans 2 — — 2 The Company’s commercial mortgage loan portfolio consists of mortgage loans that are collateralized by real estate. Due to the collateralized nature of the loans, any assessment of impairment and ultimate loss given a default on the loans is based upon a consideration of the estimated fair value of the real estate. The Company limits accrued interest income on impaired loans to 90 days of interest. Once accrued interest on the impaired loan is received, interest income is recognized on a cash basis. Mortgage loans that were modified in a troubled debt restructuring as of March 31, 2018 and December 31, 2017 were as follows: Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (Dollars In Thousands) As of March 31, 2018 Troubled debt restructuring: Commercial mortgage loans 0 $ — $ — As of December 31, 2017 Troubled debt restructuring: Commercial mortgage loans 1 $ 418 $ 418

GOODWILL

GOODWILL	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL	GOODWILL The balance of goodwill for the Company as of March 31, 2018 was $793.5 million . There has been no change to goodwill during the three months ended March 31, 2018 . Accounting for goodwill requires an estimate of the future profitability of the associated lines of business to assess the recoverability of the capitalized acquisition goodwill. The Company evaluates the carrying value of goodwill at the segment (or reporting unit) level at least annually and between annual evaluations if events occur or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying amount. Such circumstances could include, but are not limited to: 1) a significant adverse change in legal factors or in business climate, 2) unanticipated competition, or 3) an adverse action or assessment by a regulator. When evaluating whether goodwill is impaired, the Company first determines through qualitative analysis whether relevant events and circumstances indicate that it is more likely than not that segment goodwill balances are impaired as of the testing date. If it is determined that it is more likely than not that impairment exists, the Company compares its estimate of the fair value of the reporting unit to which the goodwill is assigned to the reporting unit’s carrying amount, including goodwill. The Company utilizes a fair value measurement (which includes a discounted cash flows analysis) to assess the carrying value of the reporting units in consideration of the recoverability of the goodwill balance assigned to each reporting unit as of the measurement date. The Company’s material goodwill balances are attributable to certain of its operating segments (which are each considered to be reporting units). The cash flows used to determine the fair value of the Company’s reporting units are dependent on a number of significant assumptions. The Company’s estimates, which consider a market participant view of fair value, are subject to change given the inherent uncertainty in predicting future results and cash flows, which are impacted by such things as policyholder behavior, competitor pricing, capital limitations, new product introductions, and specific industry and market conditions. The balance recognized as goodwill is not amortized, but is reviewed for impairment on an annual basis, or more frequently as events or circumstances may warrant, including those circumstances which would more likely than not reduce the fair value of the Company’s reporting units below its carrying amount. During the fourth quarter of 2017 , the Company performed its annual evaluation of goodwill based on information as of October 1, 2017 , and determined that no adjustment to impair goodwill was necessary. During the three months ended March 31, 2018 , the Company did not identify any events or circumstances which would indicate that the fair value of its operating segments would have declined below their book value, either individually or in the aggregate.

DEBT AND OTHER OBLIGATIONS

DEBT AND OTHER OBLIGATIONS	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
DEBT AND OTHER OBLIGATIONS	DEBT AND OTHER OBLIGATIONS Debt and Subordinated Debt Securities Debt and subordinated debt securities are summarized as follows: As of March 31, 2018 December 31, 2017 Outstanding Principal Carrying Amounts Outstanding Principal Carrying Amounts (Dollars In Thousands) Debt (year of issue): Credit Facility $ 325,000 $ 325,000 $ — $ — Capital lease obligation 1,591 1,591 1,682 1,682 6.40% Senior Notes (2007), due 2018 — — 150,000 150,518 7.375% Senior Notes (2009), due 2019 400,000 431,015 400,000 435,806 8.45% Senior Notes (2009), due 2039 221,516 338,762 232,928 357,046 $ 948,107 $ 1,096,368 $ 784,610 $ 945,052 Subordinated debt securities (year of issue): 5.35% Subordinated Debentures (2017), due 2052 $ 500,000 $ 495,324 $ 500,000 $ 495,289 $ 500,000 $ 495,324 $ 500,000 $ 495,289 During the three months ended March 31, 2018 , the Company repurchased and subsequently extinguished $17.5 million (par value - $11.4 million ) of the Company's 8.45% Senior Notes due 2039. These repurchases resulted in a $0.5 million pre-tax gain for the Company. The gain is recorded in other income in the consolidated condensed statements of income. During 2017, the Company issued $500.0 million of its Subordinated Debentures due 2052. These Subordinated Debentures are carried on the Company's balance sheet net of the associated deferred issuance expenses of $4.8 million . The Company used the net proceeds from the offering to call and redeem, at par, the entire $150.0 million of 6.00% Subordinated Debentures due 2042 and $287.5 million of 6.25% Subordinated Debentures due 2042. The Company has the ability to borrow on an unsecured basis up to an aggregate principal amount of $1.0 billion under a Credit Facility. The Company has the right in certain circumstances to request that the commitment under the Credit Facility be increased up to a maximum principal amount of $1.25 billion . Balances outstanding under the Credit Facility accrue interest at a rate equal to, at the option of the Borrowers, (i) LIBOR plus a spread based on the ratings of the Company’s Senior Debt, or (ii) the sum of (A) a rate equal to the highest of (x) the Administrative Agent’s Prime rate , (y) 0.50% above the Funds rate , or (z) the one-month LIBOR plus 1.00% and (B) a spread based on the ratings of the Company's Senior Debt. The Credit Facility also provided for a facility fee at a rate that varies with the ratings of the Company’s Senior Debt and that is calculated on the aggregate amount of commitments under the Credit Facility, whether used or unused. The annual facility fee rate is 0.125% of the aggregate principal amount. The Credit Facility provides that the Company is liable for the full amount of any obligations for borrowings or letters of credit, including those of PLICO, under the Credit Facility. The maturity date of the Credit Facility is February 2, 2020. The Company is not aware of any non-compliance with the financial debt covenants of the Credit Facility as of March 31, 2018 . There was an outstanding balance of $325.0 million bearing interest at a rate of LIBOR plus 1.00% as of March 31, 2018 . Non-Recourse Funding Obligations Non-recourse funding obligations outstanding as of March 31, 2018 , on a consolidated basis, are shown in the following table: Issuer Outstanding Principal Carrying Value (1) Maturity Year-to-Date (Dollars In Thousands) Golden Gate Captive Insurance Company (2)(3) $ 1,981,000 $ 1,981,000 2039 4.75 % Golden Gate II Captive Insurance Company 58,600 49,464 2052 4.29 % Golden Gate V Vermont Captive Insurance Company (2)(3) 635,000 695,836 2037 5.12 % MONY Life Insurance Company (3) 1,091 2,389 2024 6.19 % Total $ 2,675,691 $ 2,728,689 (1) Carrying values include premiums and discounts and do not represent unpaid principal balances. (2) Obligations are issued to non-consolidated subsidiaries of the Company. These obligations collateralize certain held-to-maturity securities issued by wholly owned subsidiaries of PLICO. (3) Fixed rate obligations Non-recourse funding obligations outstanding as of December 31, 2017 , on a consolidated basis, are shown in the following table: Issuer Outstanding Principal Carrying Value (1) Maturity Year Year-to-Date Weighted-Avg Interest Rate (Dollars In Thousands) Golden Gate Captive Insurance Company (2)(3) $ 2,014,000 $ 2,014,000 2039 4.75 % Golden Gate II Captive Insurance Company 58,600 49,787 2052 3.88 % Golden Gate V Vermont Captive Insurance Company (2)(3) 620,000 681,285 2037 5.12 % MONY Life Insurance Company (3) 1,091 2,405 2024 6.19 % Total $ 2,693,691 $ 2,747,477 (1) Carrying values include premiums and discounts and do not represent unpaid principal balances. (2) Obligations are issued to non-consolidated subsidiaries of the Company. These obligations collateralize certain held-to-maturity securities issued by wholly owned subsidiaries of PLICO. (3) Fixed rate obligations Secured Financing Transactions Repurchase Program Borrowings While the Company anticipates that the cash flows of its operating subsidiaries will be sufficient to meet its investment commitments and operating cash needs in a normal credit market environment, the Company recognizes that investment commitments scheduled to be funded may, from time to time, exceed the funds then available. Therefore, the Company has established repurchase agreement programs for certain of its insurance subsidiaries to provide liquidity when needed. The Company expects that the rate received on its investments will equal or exceed its borrowing rate. Under this program, the Company may, from time to time, sell an investment security at a specific price and agree to repurchase that security at another specified price at a later date. These borrowings are typically for a term less than 90 days . The market value of securities to be repurchased is monitored and collateral levels are adjusted where appropriate to protect the counterparty against credit exposure. Cash received is invested in fixed maturity securities, and the agreements provided for net settlement in the event of default or on termination of the agreements. As of March 31, 2018 , the fair value of securities pledged under the repurchase program was $753.6 million , and the repurchase obligation of $665.0 million was included in the Company’s consolidated condensed balance sheets (at an average borrowing rate of 173 basis points). During the three months ended March 31, 2018 , the maximum balance outstanding at any one point in time related to these programs was $885.0 million . The average daily balance was $808.0 million (at an average borrowing rate of 149 basis points) during the three months ended March 31, 2018 . As of December 31, 2017 , the fair value of securities pledged under the repurchase program was $1,006.6 million , and the repurchase obligation of $885.0 million was included in the Company's consolidated condensed balance sheets (at an average borrowing rate of 142 basis points). During 2017 , the maximum balance outstanding at any one point in time related to these programs was $988.5 million . The average daily balance was $624.7 million (at an average borrowing rate of 101 basis points) during the year ended December 31, 2017 . Securities Lending The Company participates in securities lending, primarily as an investment yield enhancement, whereby securities that are held as investments are loaned out to third parties for short periods of time. The Company requires initial collateral of 102% of the market value of the loaned securities to be separately maintained. The loaned securities’ market value is monitored on a daily basis. As of March 31, 2018, securities with a market value of $107.0 million were loaned under this program. As collateral for the loaned securities, the Company receives short-term investments, which are recorded in “short-term investments” with a corresponding liability recorded in “secured financing liabilities” to account for its obligation to return the collateral. As of March 31, 2018, the fair value of the collateral related to this program was $113.9 million and the Company has an obligation to return $113.9 million of collateral to the securities borrowers. The following table provides the amount by asset class of securities of collateral pledged for repurchase agreements and securities that have been loaned as part of securities lending transactions as of March 31, 2018 and December 31, 2017: Repurchase Agreements, Securities Lending Transactions, and Repurchase-to-Maturity Transactions Accounted for as Secured Borrowings Remaining Contractual Maturity of the Agreements As of March 31, 2018 (Dollars In Thousands) Overnight and Up to 30 days 30-90 days Greater Than Total Repurchase agreements and repurchase-to-maturity transactions U.S. Treasury and agency securities $ 293,539 $ — $ — $ — $ 293,539 Other asset-backed securities — — — — — Mortgage loans 460,072 — — — 460,072 Total repurchase agreements and repurchase-to-maturity transactions 753,611 — — — 753,611 Securities lending transactions Corporate securities 94,155 — — — 94,155 Equity securities 12,798 — — — 12,798 Redeemable preferred stock 75 — — — 75 Total securities lending transactions 107,028 — — — 107,028 Total securities $ 860,639 $ — $ — $ — $ 860,639 Repurchase Agreements, Securities Lending Transactions, and Repurchase-to-Maturity Transactions Accounted for as Secured Borrowings Remaining Contractual Maturity of the Agreements As of December 31, 2017 (Dollars In Thousands) Overnight and Up to 30 days 30-90 days Greater Than Total Repurchase agreements and repurchase-to-maturity transactions U.S. Treasury and agency securities $ 307,633 $ — $ — $ — $ 307,633 Corporate securities — — — — — Mortgage loans 698,974 — — — 698,974 Total securities $ 1,006,607 $ — $ — $ — $ 1,006,607 Securities lending transactions Corporate securities $ 118,817 $ — $ — $ — $ 118,817 Equity securities 5,699 — — — 5,699 Redeemable preferred stock 755 — — — 755 Total securities lending transactions 125,271 — — — 125,271 Total securities $ 1,131,878 $ — $ — $ — $ 1,131,878

COMMITMENTS AND CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES The Company has entered into indemnity agreements with each of its current directors other than those that are employees of Dai-ichi Life that provide, among other things and subject to certain limitations, a contractual right to indemnification to the fullest extent permissible under the law. The Company has agreements with certain of its officers providing up to $10 million in indemnification. These obligations are in addition to the customary obligation to indemnify officers and directors contained in the Company’s governance documents. Under the insurance guaranty fund laws in most states, insurance companies doing business therein can be assessed up to prescribed limits for policyholder losses incurred by insolvent companies. From time to time, companies may be asked to contribute amounts beyond prescribed limits. It is possible that the Company could be assessed with respect to product lines not offered by the Company. In addition, legislation may be introduced in various states with respect to guaranty fund assessment laws related to insurance products, including long term care insurance and other specialty products, that increases the cost of future assessments or alters future premium tax offsets received in connection with guaranty fund assessments. The Company cannot predict the amount, nature or timing of any future assessments or legislation, any of which could have a material and adverse impact on the Company's financial condition or results of operations. A number of civil jury verdicts have been returned against insurers, broker-dealers, and other providers of financial services involving sales, refund or claims practices, alleged agent misconduct, failure to properly supervise representatives, relationships with agents or persons with whom the insurer does business, and other matters. Often these lawsuits have resulted in the award of substantial judgments that are disproportionate to the actual damages, including material amounts of punitive and non-economic compensatory damages. In some states, juries, judges, and arbitrators have substantial discretion in awarding punitive and non-economic compensatory damages which creates the potential for unpredictable material adverse judgments or awards in any given lawsuit or arbitration. Arbitration awards are subject to very limited appellate review. In addition, in some class action and other lawsuits, companies have made material settlement payments. The financial services and insurance industries in particular are also sometimes the target of law enforcement and regulatory investigations relating to the numerous laws and regulations that govern such companies. Some companies have been the subject of law enforcement or regulatory actions or other actions resulting from such investigations. The Company, in the ordinary course of business, is involved in such matters. The Company establishes liabilities for litigation and regulatory actions when it is probable that a loss has been incurred and the amount of the loss can be reasonably estimated. For matters where a loss is believed to be reasonably possible, but not probable, no liability is established. For such matters, the Company may provide an estimate of the possible loss or range of loss or a statement that such an estimate cannot be made. The Company reviews relevant information with respect to litigation and regulatory matters on a quarterly and annual basis and updates its established liabilities, disclosures and estimates of reasonably possible losses or range of loss based on such reviews. Certain of the Company’s insurance subsidiaries, as well as certain other insurance companies for which the Company has coinsured blocks of life insurance and annuity policies, are under audit for compliance with the unclaimed property laws of a number of states. The audits are being conducted on behalf of the treasury departments or unclaimed property administrators in such states. The focus of the audits is on whether there have been unreported deaths, maturities, or policies that have exceeded limiting age with respect to which death benefits or other payments under life insurance or annuity policies should be treated as unclaimed property that should be escheated to the state. The Company is presently unable to estimate the reasonably possible loss or range of loss that may result from the audits due to a number of factors, including uncertainty as to the legal theory or theories that may give rise to liability, the early stages of the audits being conducted, and uncertainty as to whether the Company or other companies are responsible for the liabilities, if any, arising in connection with certain co-insured policies. The Company will continue to monitor the matter for any developments that would make the loss contingency associated with the audits reasonably estimable. Certain of the Company’s subsidiaries are under a targeted multi-state examination with respect to their claims paying practices and their use of the U.S. Social Security Administration’s Death Master File or similar databases (a “Death Database”) to identify unreported deaths in their life insurance policies, annuity contracts and retained asset accounts. There is no clear basis in previously existing law for requiring a life insurer to search for unreported deaths in order to determine whether a benefit is owed, and substantial legal authority exists to support the position that the prevailing industry practice was lawful. A number of life insurers, however, have entered into settlement or consent agreements with state insurance regulators under which the life insurers agreed to implement procedures for periodically comparing their life insurance and annuity contracts and retained asset accounts against a Death Database, treating confirmed deaths as giving rise to a death benefit under their policies, locating beneficiaries and paying them the benefits and interest, escheating the benefits and interest to the state if the beneficiary could not be found, and paying penalties to the state, if required. It has been publicly reported that the life insurers have paid administrative and/or examination fees to the insurance regulators in connection with the settlement or consent agreements. The Company believes that insurance regulators could demand from the Company administrative and/or examination fees relating to the targeted multi-state examination. Based on publicly reported payments by other life insurers, the Company does not believe such fees, if assessed, would have a material effect on its financial statements .

EMPLOYEE BENEFIT PLANS

EMPLOYEE BENEFIT PLANS	3 Months Ended
	Mar. 31, 2018
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]
EMPLOYEE BENEFIT PLANS	EMPLOYEE BENEFIT PLANS Components of the net periodic benefit cost for the three months ended March 31, 2018 and 2017 , are as follows: For The 2018 2017 Qualified Nonqualified Qualified Pension Plan Nonqualified Excess Pension Plan (Dollars In Thousands) Service cost — benefits earned during the period $ 3,441 $ 387 $ 3,348 $ 334 Interest cost on projected benefit obligation 2,397 359 2,191 297 Expected return on plan assets (4,026 ) — (3,352 ) — Amortization of prior service cost — — — — Amortization of actuarial loss/(gain) — 265 — 118 Preliminary net periodic benefit cost 1,812 1,011 2,187 749 Settlement/curtailment expense — — — — Total net periodic benefit costs $ 1,812 $ 1,011 $ 2,187 $ 749 During the three months ended March 31, 2018 , the Company did not make a contribution to its defined benefit pension plan. The Company will make contributions in future periods as necessary to at least satisfy minimum funding requirements, to maintain an adjusted funding target attainment percentage (“AFTAP”) of at least 80% and to avoid certain Pension Benefit Guaranty Corporation (“PBGC”) reporting triggers. The Company may also make additional discretionary contributions in excess of the contribution amounts established by the current funding policy.

ACCUMULATED OTHER COMPREHENSIVE

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	3 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) The following tables summarize the changes in the accumulated balances for each component of accumulated other comprehensive income (loss) (“AOCI”) as of March 31, 2018 and December 31, 2017 . Changes in Accumulated Other Comprehensive Income (Loss) by Component Unrealized (2) Accumulated Minimum Pension Liability Adjustment Total (Dollars In Thousands, Net of Tax) Beginning Balance, December 31, 2017 $ 25,874 $ 747 $ (13,925 ) $ 12,696 Other comprehensive income (loss) before reclassifications (577,712 ) 487 — (577,225 ) Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings 681 — — 681 Amounts reclassified from accumulated other comprehensive income (loss) (1) 11 89 — 100 Net current-period other comprehensive income (loss) (577,020 ) 576 — (576,444 ) Cumulative effect adjustments (10,552 ) — — (10,552 ) Ending Balance, March 31, 2018 $ (561,698 ) $ 1,323 $ (13,925 ) $ (574,300 ) (1) See Reclassification table below for details. (2) As of March 31, 2018, net unrealized losses reported in AOCI were offset by $340.2 million due to the impact those net unrealized losses would have had on certain of the Company’s insurance assets and liabilities if the net unrealized losses had been recognized in net income. Changes in Accumulated Other Comprehensive Income (Loss) by Component Unrealized (2) Accumulated Minimum Pension Liability Adjustment Total (Dollars In Thousands, Net of Tax) Beginning Balance, December 31, 2016 $ (656,322 ) $ 727 $ 1,072 $ (654,523 ) Other comprehensive income (loss) before reclassifications 700,536 (563 ) (15,726 ) 684,247 Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings 7,153 — — 7,153 Amounts reclassified from accumulated other (1) 642 451 501 1,594 Net current-period other comprehensive income (loss) 708,331 (112 ) (15,225 ) 692,994 Cumulative effect adjustments (26,135 ) 132 228 (25,775 ) Ending Balance, December 31, 2017 $ 25,874 $ 747 $ (13,925 ) $ 12,696 (1) See Reclassification table below for details. (2) As of December 31, 2016 and December 31, 2017, net unrealized losses reported in AOCI were offset by $424.1 million and $(6.3) million, respectively, due to the impact those net unrealized losses would have had on certain of the Company’s insurance assets and liabilities if the net unrealized losses had been recognized in net income. The following tables summarize the reclassifications amounts out of AOCI for the three months ended March 31, 2018 and 2017 . Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount Other Comprehensive Affected Line Item in the For The Three Months Ended March 31, 2018 Income (Loss) Consolidated Condensed Statements of Income (Dollars In Thousands) Gains and losses on derivative instruments Net settlement (expense)/benefit (1) $ (113 ) Benefits and settlement expenses, net of reinsurance ceded (113 ) Total before tax 24 Tax (expense) or benefit $ (89 ) Net of tax Unrealized gains and losses on available-for-sale securities Net investment gains (losses) $ 2,783 Realized investment gains (losses): All other investments Impairments recognized in earnings (3,645 ) Net impairment losses recognized in earnings (862 ) Total before tax 181 Tax (expense) or benefit $ (681 ) Net of tax (1) See Note 6, Derivative Financial Instruments for additional information Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount Other Comprehensive Affected Line Item in the For The Three Months Ended March 31, 2017 Income (Loss) Consolidated Condensed Statements of Income (Dollars In Thousands) Gains and losses on derivative instruments Net settlement (expense)/benefit (1) $ (205 ) Benefits and settlement expenses, net of reinsurance ceded (205 ) Total before tax 72 Tax (expense) or benefit $ (133 ) Net of tax Unrealized gains and losses on available-for-sale securities Net investment gains (losses) $ 9,481 Realized investment gains (losses): All other investments Impairments recognized in earnings (7,831 ) Net impairment losses recognized in earnings 1,650 Total before tax (578 ) Tax (expense) or benefit $ 1,072 Net of tax

INCOME TAXES

INCOME TAXES	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES The Company used its respective estimates for its annual 2018 and 2017 incomes in computing its effective income tax rates for the three months ended March 31, 2018 and 2017. The estimate of the annual 2018 income excluded unrealized gains and losses on equity securities due to an inability to forecast future gains and losses. The Company's effective tax rate related to continuing operations varied from the maximum federal income tax rates as follows: For The Three Months Ended March 31, 2018 2017 Statutory federal income tax rate applied to pre-tax income 21.0 % 35.0 % State income taxes 1.2 0.6 Investment income not subject to tax (2.8 ) (3.2 ) Unrealized tax positions — 0.5 Other (0.1 ) — 19.3 % 32.9 % In 2012, the IRS proposed favorable and unfavorable adjustments to the Company's 2003 through 2007 reported taxable income. The Company protested certain unfavorable adjustments and sought resolution at the IRS' Appeals Division. In October 2015, Appeals accepted the Company's earlier proposed settlement offer. In September 2015, the IRS proposed favorable and unfavorable adjustments to the Company's 2008 through 2011 reported taxable income. The Company agreed to these adjustments. In April 2017, a routine review by Congress’ Joint Committee on Taxation was finalized without change and the Company received an approximate $6.2 million net refund in the fourth quarter of 2017. The resulting net adjustment to the Company's current income taxes for the years 2003 through 2011 did not materially affect the Company or its effective tax rate. In July 2016, the IRS proposed favorable and unfavorable adjustments to the Company's 2012 and 2013 reported taxable income. The Company agreed to these adjustments. The resulting settlement paid in September 2016 did not materially impact the Company or its effective tax rate. There have been no material changes to the balance of unrecognized tax benefits, where the changes impact earnings, during the quarter ending March 31, 2018. The Company believes that in the next twelve months, none of the unrecognized tax benefits will be reduced. In general, the Company is no longer subject to income tax examinations by taxing authorities for tax years that began before 2014. Furthermore, due to the aforementioned IRS adjustments to the Company's pre-2014 taxable income, the Company has amended certain of its 2003 through 2013 state income tax returns. Such amendments will cause such years to remain open, pending the states' acceptances of the returns. During the year ended December 31, 2016, the Company entered into a reinsurance transaction. This transaction generated an operating loss on the Company’s consolidated 2016 U.S. income tax return. The Company partially carried back this loss and received refunds for substantially all of the U.S. income taxes it paid in 2014 and 2015 and expects to fully utilize the remaining operating loss carryforward during the carryforward period. Based on the Company’s current assessment of future taxable income, including available tax planning opportunities, the Company anticipates that it is more likely than not that it will generate sufficient taxable income to realize all of its material deferred tax assets. The Company did not record a valuation allowance against its material deferred tax assets as of March 31, 2018 and December 31, 2017. In the tax year ended December 31, 2017, the Company recognized provisional impacts related to the revaluation of certain deferred tax assets under the Tax Reform Act under Staff Accounting Bulletin No. 118. The ultimate impact may differ from these provisional amounts, possibly materially, due to, among other things, additional regulatory guidance that may be issued, additional analysis, and resulting changes in interpretations and assumptions the Company has made. Any adjustments to these provisional amounts will be reported as a component of income tax expense (benefit) in the reporting period in which any such adjustments are determined. There are no such adjustments for the three months ended March 31, 2018. The accounting is expected to be complete by December 22, 2018.

OPERATING SEGMENTS

OPERATING SEGMENTS	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
OPERATING SEGMENTS	OPERATING SEGMENTS The Company has several operating segments, each having a strategic focus. An operating segment is distinguished by products, channels of distribution, and/or other strategic distinctions. The Company periodically evaluates its operating segments and makes adjustments to its segment reporting as needed. A brief description of each segment follows. • The Life Marketing segment markets fixed universal life (“UL”), indexed universal life ("IUL"), variable universal life (“VUL”), bank-owned life insurance (“BOLI”), and level premium term insurance (“traditional”) products on a national basis primarily through networks of independent insurance agents and brokers, broker-dealers, financial institutions, independent marketing organizations, and affinity groups. • The Acquisitions segment focuses on acquiring, converting, and servicing policies and contracts acquired from other companies. The segment’s primary focus is on life insurance policies and annuity products that were sold to individuals. The level of the segment’s acquisition activity is predicated upon many factors, including available capital, operating capacity, potential return on capital, and market dynamics. Policies acquired through the Acquisitions segment are typically blocks of business where no new policies are being marketed. Therefore earnings and account values are expected to decline as the result of lapses, deaths, and other terminations of coverage unless new acquisitions are made. • The Annuities segment markets fixed and VA products. These products are primarily sold through broker-dealers, financial institutions, and independent agents and brokers. • The Stable Value Products segment sells fixed and floating rate funding agreements directly to the trustees of municipal bond proceeds, money market funds, bank trust departments, and other institutional investors. This segment also issues funding agreements to the FHLB, and markets guaranteed investment contracts ("GICs") to 401(k) and other qualified retirement savings plans. The Company also has an unregistered funding agreement-backed notes program which provides for offers of notes to both domestic and international institutional investors. • The Asset Protection segment markets extended service contracts, GAP products, credit life and disability insurance, and other specialized ancillary products to protect consumers’ investments in automobiles, recreational vehicles, watercraft, and powersports. GAP products are designed to cover the difference between the scheduled loan pay-off amount and an asset’s actual cash value in the case of a total loss. Each type of specialized ancillary product protects against damage or other loss to a particular aspect of the underlying asset. • The Corporate and Other segment primarily consists of net investment income on assets supporting our equity capital, unallocated corporate overhead and expenses not attributable to the segments above (including interest on corporate debt). This segment includes earnings from several non-strategic or runoff lines of business, various financing and investment related transactions, and the operations of several small subsidiaries. The Company's management and Board of Directors analyzes and assesses the operating performance of each segment using "pre-tax adjusted operating income (loss)" and "after-tax adjusted operating income (loss)". Consistent with GAAP accounting guidance for segment reporting, pre-tax adjusted operating income (loss) is the Company's measure of segment performance. Pre-tax adjusted operating income (loss) is calculated by adjusting "income (loss) before income tax," by excluding the following items: • realized gains and losses on investments and derivatives, • changes in the GLWB embedded derivatives exclusive of the portion attributable to the economic cost of the GLWB, • actual GLWB incurred claims, and • the amortization of deferred policy acquisition costs ("DAC"), value of business acquired ("VOBA"), and certain policy liabilities that is impacted by the exclusion of these items. The items excluded from adjusted operating income (loss) are important to understanding the overall results of operations. Pre-tax adjusted operating income (loss) and after-tax adjusted operating income (loss) are not substitutes for income before income taxes or net income (loss), respectively. These measures may not be comparable to similarly titled measures reported by other companies. The Company believes that pre-tax and after-tax adjusted operating income (loss) enhances management's and the Board of Directors' understanding of the ongoing operations, the underlying profitability of each segment, and helps facilitate the allocation of resources. After-tax adjusted operating income (loss) is derived from pre-tax adjusted operating income (loss) with the inclusion of income tax expense or benefits associated with pre-tax adjusted operating income. Income tax expense or benefits is allocated to the items excluded from pre-tax adjusted operating income (loss) at the statutory federal income tax rate for the associated period. For periods ending on and prior to December 31, 2017, a rate of 35% was used. Beginning in 2018, a statutory federal income tax rate of 21% will be used to allocate income tax expense or benefits to items excluded from pre-tax adjusted operating income (loss). Income tax expense or benefits allocated to after-tax adjusted operating income (loss) can vary period to period based on changes in the Company's effective income tax rate. In determining the components of the pre-tax adjusted operating income (loss) for each segment, premiums and policy fees, other income, benefits and settlement expenses, and amortization of DAC and VOBA are attributed directly to each operating segment. Net investment income is allocated based on directly related assets required for transacting the business of that segment. Realized investment gains (losses) and other operating expenses are allocated to the segments in a manner that most appropriately reflects the operations of that segment. Investments and other assets are allocated based on statutory policy liabilities net of associated statutory policy assets, while DAC/VOBA and goodwill are shown in the segments to which they are attributable. There were no significant intersegment transactions during the three months ended March 31, 2018 and 2017 . The following tables present a summary of results and reconciles pre-tax adjusted operating income (loss) to consolidated income before income tax and net income: For The 2018 2017 (Dollars In Thousands) Revenues Life Marketing $ 434,916 $ 421,392 Acquisitions 379,094 401,367 Annuities 150,713 108,642 Stable Value Products 53,868 40,843 Asset Protection 76,375 80,083 Corporate and Other 70,866 52,970 Total revenues $ 1,165,832 $ 1,105,297 Pre-tax Adjusted Operating Income (Loss) Life Marketing $ (17,849 ) $ 18,945 Acquisitions 55,520 53,667 Annuities 40,531 53,007 Stable Value Products 29,080 23,899 Asset Protection 6,218 5,599 Corporate and Other (20,679 ) (19,728 ) Pre-tax adjusted operating income 92,821 135,389 Realized (losses) gains on investments and derivatives (1,023 ) (23,040 ) Income before income tax 91,798 112,349 Income tax expense (17,686 ) (36,935 ) Net income $ 74,112 $ 75,414 Pre-tax adjusted operating income $ 92,821 $ 135,389 Adjusted operating income tax (expense) benefit (18,044 ) (44,999 ) After-tax adjusted operating income 74,777 90,390 Realized (losses) gains on investments and derivatives (1,023 ) (23,040 ) Income tax benefit (expense) on adjustments 358 8,064 Net income $ 74,112 $ 75,414 Realized investment (losses) gains: Derivative financial instruments $ 78,059 $ (69,878 ) All other investments (87,599 ) 22,841 Net impairment losses recognized in earnings (3,645 ) (7,831 ) Less: related amortization (1) 9,156 (10,744 ) Less: VA GLWB economic cost (21,318 ) (21,084 ) Realized (losses) gains on investments and derivatives $ (1,023 ) $ (23,040 ) (1) Includes amortization of DAC/VOBA and benefits and settlement expenses that are impacted by realized gains (losses). Operating Segment Assets (Dollars In Thousands) Life Marketing Acquisitions Annuities Stable Value Products Investments and other assets $ 14,744,343 $ 19,275,508 $ 20,535,539 $ 4,571,793 DAC and VOBA 1,374,149 90,466 800,941 6,133 Other intangibles 277,489 33,909 166,784 7,889 Goodwill 200,274 14,524 336,677 113,813 Total assets $ 16,596,255 $ 19,414,407 $ 21,839,941 $ 4,699,628 Asset Protection Corporate and Other Total Consolidated Investments and other assets $ 1,016,586 $ 13,988,814 $ 74,132,583 DAC and VOBA 162,465 — 2,434,154 Other intangibles 130,573 35,063 651,707 Goodwill 128,182 — 793,470 Total assets $ 1,437,806 $ 14,023,877 $ 78,011,914 Operating Segment Assets (Dollars In Thousands) Life Marketing Acquisitions Annuities Stable Value Products Investments and other assets $ 14,914,418 $ 19,588,133 $ 20,938,409 $ 4,569,639 DAC and VOBA 1,320,776 74,862 772,634 6,864 Other intangibles 282,361 34,548 170,117 8,056 Goodwill 200,274 14,524 336,677 113,813 Total assets $ 16,717,829 $ 19,712,067 $ 22,217,837 $ 4,698,372 Asset Protection Corporate and Other Total Consolidated Investments and other assets $ 918,952 $ 15,043,597 $ 75,973,148 DAC and VOBA 24,441 — 2,199,577 Other intangibles 133,234 35,256 663,572 Goodwill 128,182 — 793,470 Total assets $ 1,204,809 $ 15,078,853 $ 79,629,767

SUBSEQUENT EVENTS

SUBSEQUENT EVENTS	3 Months Ended
	Mar. 31, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENTS	SUBSEQUENT EVENTS The Company has evaluated the effects of events subsequent to March 31, 2018 , and through the date we filed our consolidated condensed financial statements with the United States Securities and Exchange Commission. All accounting and disclosure requirements related to subsequent events are included in our consolidated condensed financial statements. On May 1, 2018, The Lincoln National Life Insurance Company (“Lincoln Life”) completed its previously announced acquisition (the “Closing”) of Liberty Mutual Group Inc.’s (“Liberty Mutual”) Group Benefits Business and Individual Life and Annuity Business (the “Life Business”) through the acquisition of all of the issued and outstanding capital stock of Liberty Life Assurance Company of Boston (“Liberty”). In connection with the Closing and pursuant to the Master Transaction Agreement, dated January 18, 2018 (the “Master Transaction Agreement”), previously reported in the Company's Current Report on Form 8-K filed on January 23, 2018, PLICO and Protective Life and Annuity Insurance Company (“PLAIC”), a wholly owned subsidiary of PLICO, entered into reinsurance agreements (the “Reinsurance Agreements”) and related ancillary documents (including administrative services agreements and transition services agreements) providing for the reinsurance and administration of the Life Business. Pursuant to the Reinsurance Agreements, Liberty ceded to PLICO and PLAIC the insurance policies related to the Life Business on a 100% coinsurance basis. The aggregate ceding commission for the reinsurance of the Life Business was $422.9 million . All policies issued in states other than New York were ceded to PLICO under a reinsurance agreement between Liberty and PLICO, and all policies issued in New York were ceded to PLAIC under a reinsurance agreement between Liberty and PLAIC. The aggregate statutory reserves of Liberty ceded to PLICO and PLAIC as of the closing of the Transaction were approximately $13.3 billion , which amount was based on initial estimates and is subject to adjustment following the Closing. Pursuant to the terms of the Reinsurance Agreements, each of PLICO and PLAIC are required to maintain assets in trust for the benefit of Liberty to secure their respective obligations to Liberty under the Reinsurance Agreements. The trust accounts were initially funded by each of PLICO and PLAIC principally with the investment assets that were received from Liberty. Additionally, PLICO and PLAIC have each agreed to provide, on behalf of Liberty, administration and policyholder servicing of the Life Business reinsured by it pursuant to administrative services agreements between Liberty and each of PLICO and PLAIC. On May 3, 2018, the Company and PLICO (together with the Company, the “Borrowers”) entered into the First Amendment (the “First Amendment”) to the Amended and Restated Credit Agreement dated February 2, 2015 (the “Credit Agreement”) with the several lenders from time to time a party thereto (collectively, the “Lenders”) and with Regions Bank in its capacity as Administrative Agent for the Lenders (the “Administrative Agent”). The Credit Agreement, as amended by the First Amendment, continues to provide for a $1 billion , five -year unsecured revolving credit facility (the “Credit Facility”), including a $500 million sublimit for the potential issuance of letters of credit and a $50 million sublimit for swingline advances. Borrowings made available under the Credit Facility may be used for general corporate purposes, including the refinancing of indebtedness. The First Amendment, among other things, extends the commitment termination date and final maturity date under the Credit Agreement from February 2, 2020 to May 3, 2023, allows the Borrowers in certain circumstances to request that the commitment amount under the Credit Facility be increased to a maximum amount of $1.5 billion (increased from the maximum $1.25 billion amount originally provided in the Credit Agreement), and changes the reference dates and base amounts used to calculate the minimum Adjusted Consolidated Net Worth that the Company is required to maintain under the Credit Agreement.

SUMMARY OF SIGNIFICANT ACCOUN26

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation On February 1, 2015, Protective Life Corporation (the “Company”) became a wholly owned subsidiary of The Dai-ichi Life Insurance Company, Limited, a kabushiki kaisha organized under the laws of Japan (now known as Dai-ichi Life Holdings, Inc., “Dai-ichi Life”), when DL Investment (Delaware), Inc. a wholly owned subsidiary of Dai-ichi Life, merged with and into the Company. Prior to February 1, 2015, the Company’s stock was publicly traded on the New York Stock Exchange. Subsequent to the Merger date, the Company remains as an SEC registrant within the United States. The Company is a holding company with subsidiaries that provide financial services through the production, distribution, and administration of insurance and investment products. The Company markets individual life insurance, credit life and disability insurance, guaranteed investment contracts, guaranteed funding agreements, fixed and variable annuities, and extended service contracts throughout the United States. The Company also maintains a separate segment devoted to the acquisition of insurance policies from other companies. Founded in 1907, Protective Life Insurance Company (“PLICO”) is the Company’s largest operating subsidiary. These financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for the interim periods presented herein. In the opinion of management, the accompanying financial statements reflect all adjustments (consisting only of normal recurring items) necessary for a fair statement of the results for the interim periods presented. Operating results for the three months ended March 31, 2018 , are not necessarily indicative of the results of operations that may be expected for the year ending December 31, 2018 . The year-end consolidated condensed financial data included herein was derived from audited financial statements but does not include all disclosures required by GAAP within this report. For further information, refer to the consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 . The operating results of companies in the insurance industry have historically been subject to significant fluctuations due to changing competition, economic conditions, interest rates, investment performance, insurance ratings, claims, persistency, and other factors.
Entities Included	Entities Included The consolidated condensed financial statements in this report include the accounts of Protective Life Corporation and subsidiaries and its affiliate companies in which the Company holds a majority voting or economic interest. Intercompany balances and transactions have been eliminated.
Insurance Revenue	Property and casualty insurance products include service contract business, surety bonds, and guaranteed asset protection ("GAP"). Premiums and fees associated with service contracts and GAP products are recognized based on expected claim patterns. For all other products, premiums are generally recognized over the terms of the contract on a pro-rata basis. Commissions and fee income associated with other products are recognized as earned when the related services are provided to the customer. Unearned premium reserves are maintained for the portion of the premiums that is related to the unexpired period of the policy. Benefit reserves are recorded when insured events occur.
Reserves	Benefit reserves include case basis reserves for known but unpaid claims as of the balance sheet date as well as incurred but not reported ("IBNR") reserves for claims where the insured event has occurred but has not been reported to the Company as of the balance sheet date. The case basis reserves and IBNR are calculated based on historical experience and on assumptions relating to claim severity and frequency, the level of used vehicle prices, and other factors. These assumptions are modified as necessary to reflect anticipated trends.
Accounting Pronouncements Recently and Not Yet Adopted	Effective January 1, 2018, the Company adopted Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers . In consideration of the amendments in this Update, the Company revised its recognition pattern for administrative fees associated with certain vehicle service and GAP products. Previously, these fees were recognized based on the work effort involved in satisfying the Company’s contract obligations. The Company will recognize these fees on a claims occurrence basis in future periods. To reflect this change in accounting principle, the Company recorded a cumulative effect adjustment as of January 1, 2018 that resulted in a decrease in retained earnings of $92.5 million . The pre-tax impact to each affected line item on the Company’s financial statements is reflected in the table below: As Reported Previous Accounting Method For The Three Months Ended March 31, 2018 (Dollars In Millions) Financial Statement Line Item: Balance Sheet Deferred policy acquisition costs and value of business acquired $ 2,434.2 $ 2,295.2 Other liabilities $ 2,454.9 $ 2,193.3 Statements of Income Other income $ 114.4 $ 113.2 Amortization of deferred policy acquisition costs and value of business acquired $ 58.0 $ 44.2 Other operating expenses, net of reinsurance ceded $ 229.3 $ 243.5 Accounting Pronouncements Recently Adopted ASU No. 2014-09 - Revenue from Contracts with Customers (Topic 606). This Update provides for significant revisions to the recognition of revenue from contracts with customers across various industries. Under the new guidance, entities are required to apply a prescribed 5-step process to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The accounting for revenues associated with insurance products is not within the scope of this Update. The Update was originally effective for annual and interim periods beginning after December 15, 2016. However, in August 2015, the FASB issued ASU No. 2015-14 - Revenues from Contracts with Customers: Deferral of the Effective Date , to defer the effective date of ASU No. 2014-09 by one year to annual and interim periods beginning after December 15, 2017. The Company adopted this Update using the modified retrospective approach via a cumulative effect adjustment to retained earnings as of January 1, 2018. The amendments in the Update, along with clarifying updates issued subsequent to ASU 2014-09, impacted some of the Company's smaller lines of business, specifically revenues at the Company's affiliated broker dealers and insurance agency, and certain revenues associated with the Company's Asset Protection products. The lines of business to which the revised guidance applies are not material to the Company’s financial statements. In consideration of the amendments in this Update, the Company revised its recognition pattern for administrative fees associated with certain vehicle service and GAP products. Previously, these fees were recognized based on the work effort involved in satisfying the Company’s contract obligations. The Company will recognize these fees on a claims occurrence basis in future periods. To reflect this change in accounting principle, the Company recorded a cumulative effect adjustment as of January 1, 2018 that resulted in a decrease in retained earnings of $92.5 million . The Company also implemented minor changes to its accounting and disclosures with respect to the lines of business referenced above to ensure compliance with the revised guidance. See above for additional discussion. ASU No. 2016-01 - Financial Instruments - Recognition and Measurement of Financial Assets and Financial Liabilities. The amendments in this Update address certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. Most notably, the Update requires that equity investments (except those accounted for under the equity method of accounting or those that result in consolidation of the investee) be measured at fair value with changes in fair value recognized in net income. The Update also introduces a single-step impairment model for equity investments without a readily determinable fair value. Additionally, the Update requires changes in instrument-specific credit risk for fair value option liabilities to be recorded in other comprehensive income. The amendments in this Update are effective for annual and interim periods beginning after December 15, 2017 and were applied on a modified retrospective basis. The Company recorded a cumulative-effect adjustment at the date of adoption, January 1, 2018, transferring unrealized gains and losses on available-for-sale equity securities to retained earnings from accumulated other comprehensive income. The impact of this adjustment, net of income tax, resulted in a $10.6 million increase to retained earnings and a corresponding decrease to accumulated other comprehensive income, resulting in no net impact to consolidated shareowner's equity. The Company has updated its disclosures in Note 4, Investment Operations and Note 5, Fair Value of Financial Instruments in accordance with the ASU. ASU No. 2016-15 - Statement of Cash Flows: Classification of Certain Cash Receipts and Cash Payments. The amendments in this Update are intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. Specific transactions addressed in the new guidance include: Debt prepayment/extinguishment costs, contingent consideration payments, proceeds from the settlement of corporate-owned life insurance policies, and distributions received from equity method investments. The Update does not introduce any new accounting or financial reporting requirements, and is effective for annual and interim periods beginning after December 15, 2017 using the retrospective method. There was no financial impact. ASU No. 2016-18 - Statement of Cash Flows (Topic 230): Restricted Cash (a consensus of the FASB Emerging Task Force). The amendments in this update provide guidance on the presentation of restricted cash or restricted cash equivalents in the statement of cash flows, thereby reducing diversity in practice related to the presentation of these amounts. The amendments require that a statement of cash flows explain the change during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. The Update is effective for public business entities for fiscal years beginning after December 15, 2017, and interim periods within those fiscal years. There was no impact to the Company on adoption. ASU No. 2017-01 - Business Combinations (Topic 805): Clarifying the Definition of a Business. The purpose of this update is to clarify the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The amendments in the Update provide a specific test by which an entity may determine whether an acquisition involves a set of assets or a business. The amendments in the Update are to be applied prospectively for periods beginning after December 15, 2017. The Company has reviewed the revised requirements, and does not anticipate that the changes will impact its policies or recent conclusions related to its acquisition activities. ASU No. 2017-07 - Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost. The amendments in this update require entities to disaggregate the current-service-cost component from other components of net benefit cost and present it with other current compensation costs in the income statement. The other components of net benefit cost must be presented outside of income from operations if that subtotal is presented. In addition, the Update requires entities to disclose the income statement lines that contain the other components if they are not presented on appropriately described separate lines. The amendments in this update are effective for interim and annual periods beginning after December 15, 2017. As provided for in the ASU, the Company expects to apply the provisions of the statement retrospectively for components of net periodic pension costs and prospectively for capitalization of the service costs component of net periodic costs and net periodic postretirement benefits. The Update did not impact the Company’s financial position, results of operations, or current disclosures. Accounting Pronouncements Not Yet Adopted ASU No. 2016-02 - Leases. The amendments in this Update address certain aspects of recognition, measurement, presentation, and disclosure of leases. The most significant change will relate to the accounting model used by lessees. The Update will require all leases with terms greater than 12 months to be recorded on the balance sheet in the form of a lease asset and liability. The lease asset and liability will be measured at the present value of the minimum lease payments less any upfront payments or fees. The Update also requires numerous disclosure changes for which the Company is assessing the impact. The amendments in the Update are effective for annual and interim periods beginning after December 15, 2018 on a modified retrospective basis. The Company has completed an inventory of all leases in the organization and is currently assessing the impact of the Update and updating internal processes to ensure compliance with the revised guidance. ASU No. 2016-13 - Financial Instruments-Credit Losses: Measurement of Credit Losses on Financial Instruments. The amendments in this Update introduce a new current expected credit loss (“CECL”) model for certain financial assets, including mortgage loans and reinsurance receivables. The new model will not apply to debt securities classified as available-for-sale. For assets within the scope of the new model, an entity will recognize as an allowance against earnings its estimate of the contractual cash flows not expected to be collected on day one of the asset’s acquisition. The allowance may be reversed through earnings if a security recovers in value. This differs from the current impairment model, which requires recognition of credit losses when they have been incurred and recognizes a security’s subsequent recovery in value in other comprehensive income. The Update also makes targeted changes to the current impairment model for available-for-sale debt securities, which comprise the majority of the Company’s invested assets. Similar to the CECL model, credit loss impairments will be recorded in an allowance against earnings that may be reversed for subsequent recoveries in value. The amendments in this Update are effective for annual and interim periods beginning after December 15, 2019 on a modified retrospective basis. The Company is reviewing its policies and processes to ensure compliance with the requirements in this Update, upon adoption, and assessing the impact this standard will have on its operations and financial results. ASU No. 2017-08 - Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20): Premium Amortization on Purchased Callable Debt Securities. The amendments in this update require that premiums on callable debt securities be amortized to the first call date. This is a change from current guidance, under which premiums are amortized to the maturity date of the security. The amendments are effective for annual and interim periods beginning after December 31, 2018, and early adoption is permitted. Transition will be through a modified retrospective approach in which the cumulative effect of application is recorded to retained earnings at the beginning of the annual period in which an entity adopts the revised guidance. The Company is currently reviewing its systems and processes to determine the financial and operational impact of implementing the Update, as well as to determine whether early adoption of the revised guidance is practicable. ASU No. 2017-12 - Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities. The amendments in this update are designed to permit hedge accounting to be applied to a broader range of hedging strategies as well as to more closely align hedge accounting and risk management objectives. Specific provisions include requiring changes in the fair value of a hedging instrument be recorded in the same income statement line as the hedged item when it affects earnings. In addition, after a hedge has initially qualified as an effective hedge the Update permits the use of a qualitative hedge effectiveness test in subsequent periods. The amendments in this Update are effective for annual and interim periods beginning after December 15, 2018 and early adoption is permitted. The Company is currently assessing the impact this standard will have on its operations and financial results.

SUMMARY OF SIGNIFICANT ACCOUN27

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles	The pre-tax impact to each affected line item on the Company’s financial statements is reflected in the table below: As Reported Previous Accounting Method For The Three Months Ended March 31, 2018 (Dollars In Millions) Financial Statement Line Item: Balance Sheet Deferred policy acquisition costs and value of business acquired $ 2,434.2 $ 2,295.2 Other liabilities $ 2,454.9 $ 2,193.3 Statements of Income Other income $ 114.4 $ 113.2 Amortization of deferred policy acquisition costs and value of business acquired $ 58.0 $ 44.2 Other operating expenses, net of reinsurance ceded $ 229.3 $ 243.5

MONY CLOSED BLOCK OF BUSINESS (

MONY CLOSED BLOCK OF BUSINESS (Tables)	3 Months Ended
	Mar. 31, 2018
Closed Block Disclosure [Abstract]
Summary of Financial Information for the Closed Block	Summarized financial information for the Closed Block as of March 31, 2018 , and December 31, 2017 , is as follows: As of March 31, 2018 December 31, 2017 (Dollars In Thousands) Closed block liabilities Future policy benefits, policyholders’ account balances and other policyholder liabilities $ 5,760,621 $ 5,791,867 Policyholder dividend obligation — 160,712 Other liabilities 34,796 30,764 Total closed block liabilities 5,795,417 5,983,343 Closed block assets Fixed maturities, available-for-sale, at fair value $ 4,497,521 $ 4,669,856 Mortgage loans on real estate 107,826 108,934 Policy loans 692,632 700,769 Cash 39,464 31,182 Other assets 113,120 122,637 Total closed block assets 5,450,563 5,633,378 Excess of reported closed block liabilities over closed block assets 344,854 349,965 Portion of above representing accumulated other comprehensive income: Net unrealized investment gains (losses) net of policyholder dividend obligation: $(162,429) and $(13,429); and net of income tax: $34,911 and $2,820 (3,014 ) — Future earnings to be recognized from closed block assets and closed block liabilities $ 341,840 $ 349,965
Schedule of Reconciliation of the Policyholder Dividend Obligation	Reconciliation of the policyholder dividend obligation is as follows: For The 2018 2017 (Dollars In Thousands) Policyholder dividend obligation, beginning of period $ 160,712 $ 31,932 Applicable to net revenue (losses) (11,712 ) (16,753 ) Change in net unrealized investment gains (losses) allocated to the policyholder dividend obligation (149,000 ) 26,001 Policyholder dividend obligation, end of period $ — $ 41,180
Schedule of Closed Block Revenues and Expenses	Closed Block revenues and expenses were as follows: For The 2018 2017 (Dollars In Thousands) Revenues Premiums and other income $ 39,612 $ 42,836 Net investment income 50,543 51,359 Net investment gains (237 ) 63 Total revenues 89,918 94,258 Benefits and other deductions Benefits and settlement expenses 79,952 80,108 Other operating expenses (319 ) 166 Total benefits and other deductions 79,633 80,274 Net revenues before income taxes 10,285 13,984 Income tax expense 2,160 4,895 Net revenues $ 8,125 $ 9,089

INVESTMENT OPERATIONS (Tables)

INVESTMENT OPERATIONS (Tables)	3 Months Ended
	Mar. 31, 2018
Investments, Debt and Equity Securities [Abstract]
Realized Gain (Loss) on Investments	Net realized gains (losses) for all other investments are summarized as follows: For The 2018 2017 (Dollars In Thousands) Fixed maturities $ 2,783 $ 9,490 Equity gains and losses (1) (8,786 ) (9 ) Impairments (3,645 ) (7,831 ) Modco trading portfolio (84,709 ) 18,552 Other investments 3,113 (5,192 ) Total realized gains (losses) - investments $ (91,244 ) $ 15,010 (1) Beginning in the three month period ending March 31, 2018, all changes in the fair market value of equity securities are recorded as a realized gains (loss) as a result of the adoption of ASU No. 2016-01 Gross realized gains and gross realized losses on investments available-for-sale (fixed maturities and short-term investments) are as follows: For The 2018 2017 (Dollars In Thousands) Gross realized gains $ 8,049 $ 10,738 Gross realized losses: Impairment losses $ (3,645 ) $ (7,831 ) Other realized losses $ (5,267 ) $ (1,257 )
Schedule of Investments' Gross Unrealized Losses and Fair Value of the Company's Investments that are Not Deemed to be Other-than-Temporarily Impaired	The chart below summarizes the fair value (proceeds) and the gains (losses) realized on securities the Company sold that were in an unrealized gain position and an unrealized loss position. For The 2018 2017 (Dollars In Thousands) Securities in an unrealized gain position: Fair value (proceeds) $ 142,133 $ 169,134 Gains realized $ 8,049 $ 10,738 Securities in an unrealized loss position (1) : Fair value (proceeds) $ 56,984 $ 12,452 Losses realized $ (5,267 ) $ (1,257 ) (1) The Company made the decision to exit these holdings in conjunction with its overall asset liability management process. The following table includes the gross unrealized losses and fair value of the Company’s investments that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of March 31, 2018 : Less Than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars In Thousands) Residential mortgage-backed securities $ 1,426,703 $ (29,466 ) $ 394,955 $ (18,165 ) $ 1,821,658 $ (47,631 ) Commercial mortgage-backed securities 984,307 (24,232 ) 756,845 (34,463 ) 1,741,152 (58,695 ) Other asset-backed securities 143,917 (1,784 ) 129,840 (7,869 ) 273,757 (9,653 ) U.S. government-related securities 145,876 (3,108 ) 1,054,322 (46,893 ) 1,200,198 (50,001 ) Other government-related securities 90,010 (4,221 ) 112,461 (7,405 ) 202,471 (11,626 ) States, municipalities, and political subdivisions 505,864 (10,768 ) 1,007,246 (62,719 ) 1,513,110 (73,487 ) Corporate securities 12,307,646 (337,936 ) 10,410,752 (850,861 ) 22,718,398 (1,188,797 ) Redeemable preferred stock 57,050 (1,408 ) 22,859 (2,721 ) 79,909 (4,129 ) $ 15,661,373 $ (412,923 ) $ 13,889,280 $ (1,031,096 ) $ 29,550,653 $ (1,444,019 ) The following table includes the gross unrealized losses and fair value of the Company’s investments that are not deemed to be other-than-temporarily impaired, aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position as of December 31, 2017 : Less Than 12 Months 12 Months or More Total Fair Unrealized Fair Unrealized Fair Unrealized (Dollars In Thousands) Residential mortgage-backed securities $ 766,599 $ (9,671 ) $ 416,221 $ (13,362 ) $ 1,182,820 $ (23,033 ) Commercial mortgage-backed securities 757,471 (8,592 ) 796,456 (21,594 ) 1,553,927 (30,186 ) Other asset-backed securities 86,506 (322 ) 134,316 (5,441 ) 220,822 (5,763 ) U.S. government-related securities 94,110 (688 ) 1,072,232 (31,489 ) 1,166,342 (32,177 ) Other government-related securities 24,830 (169 ) 115,294 (4,778 ) 140,124 (4,947 ) States, municipalities, and political subdivisions 170,268 (1,738 ) 1,027,747 (43,874 ) 1,198,015 (45,612 ) Corporate securities 5,054,316 (55,795 ) 10,962,689 (472,394 ) 16,017,005 (528,189 ) Redeemable preferred stock 22,048 (1,120 ) 23,197 (2,383 ) 45,245 (3,503 ) Equities 86,586 (1,401 ) 91,195 (7,370 ) 177,781 (8,771 ) $ 7,062,734 $ (79,496 ) $ 14,639,347 $ (602,685 ) $ 21,702,081 $ (682,181 )
Debt Securities, Trading, and Equity Securities, FV-NI	The chart below summarizes the realized gains (losses) on equity securities sold during the period and equity securities still held at the reporting date. For The 2018 (Dollars In Thousands) Net gains (losses) recognized during the period on equity securities $ (8,786 ) Less: net gains (losses) recognized on equity securities sold during the period $ (1,702 ) Gains (losses) recognized during the period on equity securities still held $ (7,084 )
Schedule of Amortized Cost and Fair Value of the Company's Investments Classified as Available-for-Sale	The amortized cost and fair value of the Company’s investments classified as available-for-sale are as follows: As of March 31, 2018 Amortized Gross Unrealized Gains Gross Unrealized Losses Fair Value Total OTTI Recognized in OCI (1) (Dollars In Thousands) Fixed maturities: Residential mortgage-backed securities $ 2,430,278 $ 11,723 $ (47,631 ) $ 2,394,370 $ 14 Commercial mortgage-backed securities 1,899,618 583 (58,695 ) 1,841,506 — Other asset-backed securities 1,238,929 15,376 (9,653 ) 1,244,652 — U.S. government-related securities 1,377,633 168 (50,001 ) 1,327,800 — Other government-related securities 282,664 6,421 (11,626 ) 277,459 — States, municipals, and political subdivisions 1,767,604 6,162 (73,487 ) 1,700,279 — Corporate securities 29,487,086 261,484 (1,188,797 ) 28,559,773 — Redeemable preferred stock 94,362 336 (4,129 ) 90,569 — 38,578,174 302,253 (1,444,019 ) 37,436,408 14 Short-term investments 371,290 — — 371,290 — $ 38,949,464 $ 302,253 $ (1,444,019 ) $ 37,807,698 $ 14 As of December 31, 2017 Amortized Gross Unrealized Gains Gross Unrealized Losses Fair Value Total OTTI Recognized in OCI (1) (Dollars In Thousands) Fixed maturities: Residential mortgage-backed securities $ 2,330,832 $ 19,413 $ (23,033 ) $ 2,327,212 $ 10 Commercial mortgage-backed securities 1,914,998 5,010 (30,186 ) 1,889,822 — Other asset-backed securities 1,234,376 20,936 (5,763 ) 1,249,549 — U.S. government-related securities 1,255,244 185 (32,177 ) 1,223,252 — Other government-related securities 282,767 9,463 (4,948 ) 287,282 — States, municipals, and political subdivisions 1,770,299 16,959 (45,613 ) 1,741,645 (37 ) Corporate securities 29,606,484 623,713 (528,187 ) 29,702,010 (1 ) Redeemable preferred stock 94,362 232 (3,503 ) 91,091 — 38,489,362 695,911 (673,410 ) 38,511,863 (28 ) Equity securities 735,569 22,318 (8,771 ) 749,116 — Short-term investments 558,949 — — 558,949 — $ 39,783,880 $ 718,229 $ (682,181 ) $ 39,819,928 $ (28 ) (1) These amounts are included in the gross unrealized gains and gross unrealized losses columns above.
Schedule of Fair Value of Trading Securities	The fair value of the Company's investments classified as trading are as follows: As of March 31, 2018 As of December 31, 2017 (Dollars In Thousands) Fixed maturities: Residential mortgage-backed securities $ 265,547 $ 259,694 Commercial mortgage-backed securities 146,633 146,804 Other asset-backed securities 129,714 138,097 U.S. government-related securities 37,575 27,234 Other government-related securities 40,368 63,925 States, municipals, and political subdivisions 318,142 326,925 Corporate securities 1,645,899 1,698,183 Redeemable preferred stock 3,264 3,327 2,587,142 2,664,189 Equity securities 5,366 5,244 Short-term investments 70,491 56,261 $ 2,662,999 $ 2,725,694
Schedule of Amortized Cost and Fair Value of Available-for-Sale and Held-to-Maturity Fixed Maturities, by Expected Maturity	The amortized cost and fair value of available-for-sale and held-to-maturity fixed maturities as of March 31, 2018 , by expected maturity, are shown below. Expected maturities of securities without a single maturity date are allocated based on estimated rates of prepayment that may differ from actual rates of prepayment. Available-for-sale Held-to-maturity Amortized Cost Fair Value Amortized Cost Fair Value (Dollars In Thousands) Due in one year or less $ 912,935 $ 909,757 $ — $ — Due after one year through five years 7,026,832 6,915,584 — — Due after five years through ten years 6,881,555 6,721,386 — — Due after ten years 23,756,852 22,889,681 2,699,826 2,674,129 $ 38,578,174 $ 37,436,408 $ 2,699,826 $ 2,674,129
Gain (Loss) on Investments	The charts below summarizes the Company's other-than-temporary impairments of investments. All of the impairments were related to fixed maturities or equity securities. For The 2018 Fixed Maturities (Dollars In Thousands) Other-than-temporary impairments $ (691 ) Non-credit impairment losses recorded in other comprehensive income (2,954 ) Net impairment losses recognized in earnings $ (3,645 ) For The 2017 Fixed Maturities Equity Securities Total Securities (Dollars In Thousands) Other-than-temporary impairments $ (95 ) $ (2,630 ) $ (2,725 ) Non-credit impairment losses recorded in other comprehensive income (5,106 ) — (5,106 ) Net impairment losses recognized in earnings $ (5,201 ) $ (2,630 ) $ (7,831 )
Schedule of Available-for-Sale Credit Losses on Fixed Maturities Held by the Company for Which a Portion of Other-than-Temporary Impairments were Recognized in Other Comprehensive Income (Loss)	The following chart is a rollforward of available-for-sale credit losses on fixed maturities held by the Company for which a portion of an other-than-temporary impairment was recognized in other comprehensive income (loss): For The 2018 2017 (Dollars In Thousands) Beginning balance $ 3,268 $ 12,685 Additions for newly impaired securities — — Additions for previously impaired securities — — Reductions for previously impaired securities due to a change in expected cash flows (1,033 ) (12,685 ) Reductions for previously impaired securities that were sold in the current period — — Ending balance $ 2,235 $ —
Summary of Change in Unrealized Gains (Losses), Net of Income Tax, on Fixed Maturity and Equity Securities, Classified as Available-for-Sale	The change in unrealized gains (losses), net of income tax, on fixed maturities, classified as available-for-sale is summarized as follows: For The 2018 2017 (Dollars In Thousands) Fixed maturities $ (884,219 ) $ 224,115
Schedule of Amortized Cost and Fair Value of the Company's Investments Classified as Held-to-Maturity	The amortized cost and fair value of the Company’s investments classified as held-to-maturity as of March 31, 2018 and December 31, 2017 , are as follows: As of March 31, 2018 Amortized Gross Holding Gross Holding Fair Total OTTI (Dollars In Thousands) Fixed maturities: Securities issued by affiliates: Red Mountain LLC $ 718,826 $ — $ (56,007 ) $ 662,819 $ — Steel City LLC 1,981,000 30,310 — 2,011,310 — $ 2,699,826 $ 30,310 $ (56,007 ) $ 2,674,129 $ — As of December 31, 2017 Amortized Gross Holding Gross Holding Fair Total OTTI (Dollars In Thousands) Fixed maturities: Securities issued by affiliates: Red Mountain LLC $ 704,904 $ — $ (19,163 ) $ 685,741 $ — Steel City LLC 2,014,000 76,586 — 2,090,586 — $ 2,718,904 $ 76,586 $ (19,163 ) $ 2,776,327 $ —

FAIR VALUE OF FINANCIAL INSTR30

FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table presents the Company’s hierarchy for its assets and liabilities measured at fair value on a recurring basis as of March 31, 2018 : Measurement Category Level 1 Level 2 Level 3 Total (Dollars In Thousands) Assets: Fixed maturity securities - available-for-sale Residential mortgage-backed securities 4 $ — $ 2,394,370 $ — $ 2,394,370 Commercial mortgage-backed securities 4 — 1,841,506 — 1,841,506 Other asset-backed securities 4 — 740,863 503,789 1,244,652 U.S. government-related securities 4 1,041,123 286,677 — 1,327,800 State, municipalities, and political subdivisions 4 — 1,700,279 — 1,700,279 Other government-related securities 4 — 277,459 — 277,459 Corporate securities 4 — 27,933,364 626,409 28,559,773 Redeemable preferred stock 4 72,244 18,325 — 90,569 Total fixed maturity securities - available-for-sale 1,113,367 35,192,843 1,130,198 37,436,408 Fixed maturity securities - trading Residential mortgage-backed securities 3 — 265,547 — 265,547 Commercial mortgage-backed securities 3 — 146,633 — 146,633 Other asset-backed securities 3 — 94,756 34,958 129,714 U.S. government-related securities 3 31,684 5,891 — 37,575 State, municipalities, and political subdivisions 3 — 318,142 — 318,142 Other government-related securities 3 — 40,368 — 40,368 Corporate securities 3 — 1,640,575 5,324 1,645,899 Redeemable preferred stock 3 3,264 — — 3,264 Total fixed maturity securities - trading 34,948 2,511,912 40,282 2,587,142 Total fixed maturity securities 1,148,315 37,704,755 1,170,480 40,023,550 Equity securities 3 615,423 36 66,061 681,520 Other long-term investments (1) 3 & 4 87,558 354,855 144,352 586,765 Short-term investments 3 327,834 113,947 — 441,781 Total investments 2,179,130 38,173,593 1,380,893 41,733,616 Cash 3 307,724 — — 307,724 Other assets 3 34,463 — — 34,463 Assets related to separate accounts Variable annuity 3 13,549,068 — — 13,549,068 Variable universal life 3 1,019,250 — — 1,019,250 Total assets measured at fair value on a recurring basis $ 17,089,635 $ 38,173,593 $ 1,380,893 $ 56,644,121 Liabilities: Annuity account balances (2) 3 $ — $ — $ 81,399 $ 81,399 Other liabilities (1) 3 & 4 7,397 189,206 621,102 817,705 Total liabilities measured at fair value on a recurring basis $ 7,397 $ 189,206 $ 702,501 $ 899,104 (1) Includes certain freestanding and embedded derivatives. (2) Represents liabilities related to fixed indexed annuities. (3) Fair Value through Net Income (4) Fair Value through Other Comprehensive Income The following table presents the Company’s hierarchy for its assets and liabilities measured at fair value on a recurring basis as of December 31, 2017 : Level 1 Level 2 Level 3 Total (Dollars In Thousands) Assets: Fixed maturity securities - available-for-sale Residential mortgage-backed securities $ — $ 2,327,212 $ — $ 2,327,212 Commercial mortgage-backed securities — 1,889,822 — 1,889,822 Other asset-backed securities — 745,184 504,365 1,249,549 U.S. government-related securities 958,775 264,477 — 1,223,252 State, municipalities, and political subdivisions — 1,741,645 — 1,741,645 Other government-related securities — 287,282 — 287,282 Corporate securities — 29,075,109 626,901 29,702,010 Redeemable preferred stock 72,471 18,620 — 91,091 Total fixed maturity securities - available-for-sale 1,031,246 36,349,351 1,131,266 38,511,863 Fixed maturity securities - trading Residential mortgage-backed securities — 259,694 — 259,694 Commercial mortgage-backed securities — 146,804 — 146,804 Other asset-backed securities — 102,875 35,222 138,097 U.S. government-related securities 21,183 6,051 — 27,234 State, municipalities, and political subdivisions — 326,925 — 326,925 Other government-related securities — 63,925 — 63,925 Corporate securities — 1,692,741 5,442 1,698,183 Redeemable preferred stock 3,327 — — 3,327 Total fixed maturity securities - trading 24,510 2,599,015 40,664 2,664,189 Total fixed maturity securities 1,055,756 38,948,366 1,171,930 41,176,052 Equity securities 688,214 36 66,110 754,360 Other long-term investments (1) 51,102 417,969 136,004 605,075 Short-term investments 482,461 132,749 — 615,210 Total investments 2,277,533 39,499,120 1,374,044 43,150,697 Cash 252,310 — — 252,310 Other assets 28,771 — — 28,771 Assets related to separate accounts Variable annuity 13,956,071 — — 13,956,071 Variable universal life 1,035,202 — — 1,035,202 Total assets measured at fair value on a recurring basis $ 17,549,887 $ 39,499,120 $ 1,374,044 $ 58,423,051 Liabilities: Annuity account balances (2) $ — $ — $ 83,472 $ 83,472 Other liabilities (1) 5,755 240,927 760,890 1,007,572 Total liabilities measured at fair value on a recurring basis $ 5,755 $ 240,927 $ 844,362 $ 1,091,044 (1) Includes certain freestanding and embedded derivatives. (2) Represents liabilities related to fixed indexed annuities.
Schedule of the Valuation Method for Material Financial Instruments Included in Level 3, as well as the Unobservable Inputs Used in the Valuation of the Financial Instruments	The following table presents the valuation method for material financial instruments included in Level 3, as well as the unobservable inputs used in the valuation of those financial instruments: Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars In Thousands) Assets: Other asset-backed securities $ 503,672 Liquidation Liquidation value $90 - $97 ($94.92) Discounted cash flow Liquidity premium 0.07% - 1.09% (0.73%) Paydown rate 11.63% - 12.53% (12.16%) Corporate securities 617,724 Discounted cash flow Spread over treasury 0.96% - 4.35% (1.61%) Liabilities: (1) Embedded derivatives - GLWB (2) $ 55,468 Actuarial cash flow model Mortality 91.1% to 106.6% of Ruark 2015 ALB table Lapse 0.3% - 15%, depending on product/duration/funded status of guarantee Utilization 99%. 10% of policies have a one- time over-utilization of 400% Nonperformance risk 0.14% - 0.95% Embedded derivative - FIA 218,340 Actuarial cash flow model Expenses $146 per policy Withdrawal rate 1.5% prior to age 70, 100% of the RMD for ages 70+ Mortality 1994 MGDB table with company experience Lapse 1.0% - 30.0%, depending on duration/surrender charge period Nonperformance risk 0.14% - 0.95% Embedded derivative - IUL 77,350 Actuarial cash flow model Mortality 34% - 152% of 2015 VBT Primary Tables Lapse 0.5% - 10.0%, depending on duration/distribution channel and smoking class Nonperformance risk 0.14% - 0.95% (1) Excludes modified coinsurance arrangements. (2) The fair value for the GLWB embedded derivative is presented as a net liability. The following table presents the valuation method for material financial instruments included in Level 3, as well as the unobservable inputs used in the valuation of those financial instruments: Fair Value Valuation Technique Unobservable Input Range (Weighted Average) (Dollars In Thousands) Assets: Other asset-backed securities $ 504,228 Liquidation Liquidation value $90 - $97 ($94.91) Discounted Cash Flow Liquidity premium 0.06% - 1.17% (0.75%) Paydown rate 11.31% - 11.97% (11.54%) Corporate securities 617,770 Discounted cash flow Spread over treasury 0.81% - 3.95% (1.06%) Liabilities: (1) Embedded derivatives - GLWB (2) $ 111,760 Actuarial cash flow model Mortality 91.1% to 106.6% of Ruark 2015 ALB table Lapse 1.0% - 30.0%, depending on product/duration/funded status of guarantee Utilization 99%. 10% of policies have a one- time over-utilization of 400% Nonperformance risk 0.11% - 0.79% Embedded derivative - FIA 218,676 Actuarial cash flow model Expenses $146 per policy Withdrawal rate 1.5% prior to age 70, 100% of the RMD for ages 70+ Mortality 1994 MGDB table with company experience Lapse 1.0% - 30.0%, depending on duration/surrender charge period Nonperformance risk 0.11% - 0.79% Embedded derivative - IUL 80,212 Actuarial cash flow model Mortality 34% - 152% of 2015 VBT Primary Tables Lapse 0.5% - 10.0%, depending on duration/distribution channel and smoking class Nonperformance risk 0.11% - 0.79% (1) Excludes modified coinsurance arrangements. (2) The fair value for the GLWB embedded derivative is presented as a net liability.
Schedule of Reconciliation of the Beginning and Ending Balances for Fair Value Measurements, for which the Company has Used Significant Unobservable Inputs (Level 3)	The following table presents a reconciliation of the beginning and ending balances for fair value measurements for the three months ended March 31, 2017 , for which the Company has used significant unobservable inputs (Level 3): Total Realized and Unrealized Gains Total Realized and Unrealized Losses Total Gains (losses) included in Earnings related to Instruments still held at Beginning Balance Included in Earnings Included in Other Comprehensive Income Included in Earnings Included in Other Comprehensive Income Purchases Sales Issuances Settlements Transfers in/out of Level 3 Other Ending Balance (Dollars In Thousands) Assets: Fixed maturity securities available-for-sale Residential mortgage-backed securities $ 3 $ — $ — $ — $ — $ — $ (3 ) $ — $ — $ — $ — $ — $ — Commercial mortgage-backed securities — — — — — — — — — — — — — Other asset-backed securities 562,604 — 3,530 — (831 ) — (2,015 ) — — (6,643 ) 291 556,936 — Corporate securities 664,046 — 7,771 — (282 ) 37,259 (38,884 ) — — (2,647 ) (558 ) 666,705 — Total fixed maturity securities - available-for-sale 1,226,653 — 11,301 — (1,113 ) 37,259 (40,902 ) — — (9,290 ) (267 ) 1,223,641 — Fixed maturity securities - trading Other asset-backed securities 84,563 3,474 — (586 ) — — (19,308 ) — — — 609 68,752 2,888 Corporate securities 5,492 34 — — — — — — — — (22 ) 5,504 34 Total fixed maturity securities - trading 90,055 3,508 — (586 ) — — (19,308 ) — — — 587 74,256 2,922 Total fixed maturity securities 1,316,708 3,508 11,301 (586 ) (1,113 ) 37,259 (60,210 ) — — (9,290 ) 320 1,297,897 2,922 Equity securities 69,010 — 2 (2,630 ) — — — — — 3 (1 ) 66,384 1 Other long-term investments (1) 124,325 11,061 — (1,958 ) — — — — — — — 133,428 9,103 Total investments 1,510,043 14,569 11,303 (5,174 ) (1,113 ) 37,259 (60,210 ) — — (9,287 ) 319 1,497,709 12,026 Total assets measured at fair value on a recurring basis $ 1,510,043 $ 14,569 $ 11,303 $ (5,174 ) $ (1,113 ) $ 37,259 $ (60,210 ) $ — $ — $ (9,287 ) $ 319 $ 1,497,709 $ 12,026 Liabilities: Annuity account balances (2) $ 87,616 $ — $ — $ (887 ) $ — $ — $ — $ 180 $ 2,268 $ — $ — $ 86,415 $ — Other liabilities (1) 571,843 44,263 — (59,494 ) — — — — — — — 587,074 (15,231 ) Total liabilities measured at fair value on a recurring basis $ 659,459 $ 44,263 $ — $ (60,381 ) $ — $ — $ — $ 180 $ 2,268 $ — $ — $ 673,489 $ (15,231 ) (1) Represents certain freestanding and embedded derivatives. (2) Represents liabilities related to fixed indexed annuities. The following table presents a reconciliation of the beginning and ending balances for fair value measurements for the three months ended March 31, 2018 , for which the Company has used significant unobservable inputs (Level 3): Total Realized and Unrealized Gains Total Realized and Unrealized Losses Total Gains (losses) included in Earnings related to Instruments still held at Beginning Balance Included in Earnings Included in Other Comprehensive Income Included in Earnings Included in Other Comprehensive Income Purchases Sales Issuances Settlements Transfers in/out of Level 3 Other Ending Balance (Dollars In Thousands) Assets: Fixed maturity securities available-for-sale Residential mortgage-backed securities $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — $ — Commercial mortgage-backed securities — — — — — — — — — — — — — Other asset-backed securities 504,365 — 514 — (1,634 ) — (14 ) — — — 558 503,789 — Corporate securities 626,901 — 1,399 — (12,101 ) 35,000 (23,635 ) — — — (1,155 ) 626,409 — Total fixed maturity securities - available-for-sale 1,131,266 — 1,913 — (13,735 ) 35,000 (23,649 ) — — — (597 ) 1,130,198 — Fixed maturity securities - trading Other asset-backed securities 35,222 194 — (28 ) — — (396 ) — — — (34 ) 34,958 166 Corporate securities 5,442 — — (94 ) — — — — — — (24 ) 5,324 (94 ) Total fixed maturity securities - trading 40,664 194 — (122 ) — — (396 ) — — — (58 ) 40,282 72 Total fixed maturity securities 1,171,930 194 1,913 (122 ) (13,735 ) 35,000 (24,045 ) — — — (655 ) 1,170,480 72 Equity securities 66,110 — — (49 ) — — — — — — — 66,061 (49 ) Other long-term investments (1) 136,004 8,864 — (516 ) — — — — — — — 144,352 8,348 Total investments 1,374,044 9,058 1,913 (687 ) (13,735 ) 35,000 (24,045 ) — — — (655 ) 1,380,893 8,371 Total assets measured at fair value on a recurring basis $ 1,374,044 $ 9,058 $ 1,913 $ (687 ) $ (13,735 ) $ 35,000 $ (24,045 ) $ — $ — $ — $ (655 ) $ 1,380,893 $ 8,371 Liabilities: Annuity account balances (2) $ 83,472 $ — $ — $ (794 ) $ — $ — $ — $ 441 $ 3,308 $ — $ — $ 81,399 $ — Other liabilities (1) 760,890 161,318 — (21,530 ) — — — — — — — 621,102 139,788 Total liabilities measured at fair value on a recurring basis $ 844,362 $ 161,318 $ — $ (22,324 ) $ — $ — $ — $ 441 $ 3,308 $ — $ — $ 702,501 $ 139,788 (1) Represents certain freestanding and embedded derivatives. (2) Represents liabilities related to fixed indexed annuities.
Schedule of the Carrying Amounts and Estimated Fair Value of the Company's Financial Instruments	The carrying amounts and estimated fair values of the Company’s financial instruments as of the periods shown below are as follows: As of March 31, 2018 December 31, 2017 Fair Value Level Carrying Amounts Fair Values Carrying Amounts Fair Values (Dollars In Thousands) Assets: Mortgage loans on real estate 3 $ 6,846,633 $ 6,646,782 $ 6,817,723 $ 6,740,177 Policy loans 3 1,594,642 1,594,642 1,615,615 1,615,615 Fixed maturities, held-to-maturity (1) 3 2,699,826 2,674,129 2,718,904 2,776,327 Liabilities: Stable value product account balances 3 $ 4,699,614 $ 4,658,178 $ 4,698,371 $ 4,698,868 Future policy benefits and claims (2) 3 220,307 220,307 220,498 220,498 Other policyholders' funds (3) 3 135,202 135,921 133,508 134,253 Debt: (4) Bank borrowings 3 $ 325,000 $ 325,000 $ — $ — Senior Notes 2 769,776 751,951 943,370 933,926 Subordinated debt securities 2 495,324 486,595 495,289 501,215 Non-recourse funding obligations (5) 3 2,728,689 2,706,594 2,747,477 2,804,983 Except as noted below, fair values were estimated using quoted market prices. (1) Securities purchased from unconsolidated affiliates, Red Mountain LLC and Steel City LLC. (2) Single premium immediate annuity without life contingencies. (3) Supplementary contracts without life contingencies. (4) Excludes capital lease obligations of $1.6 million. (5) As of March 31, 2018, carrying amount of $2.6 billion and a fair value of $2.7 billion related to non-recourse funding obligations issued by Golden Gate and Golden Gate V. As of December 31, 2017, carrying amount of $2.7 billion and a fair value of $2.8 billion related to non-recourse funding obligations issued by Golden Gate and Golden Gate V.

DERIVATIVE FINANCIAL INSTRUME31

DERIVATIVE FINANCIAL INSTRUMENTS (Tables)	3 Months Ended
	Mar. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Realized Investments Gains and Losses	The following table sets forth realized investments gains and losses for the periods shown: Realized investment gains (losses) - derivative financial instruments For The 2018 2017 (Dollars In Thousands) Derivatives related to VA contracts: Interest rate futures - VA $ (16,892 ) $ 3,448 Equity futures - VA (6,428 ) (30,817 ) Currency futures - VA (7,583 ) (6,256 ) Equity options - VA 12,016 (40,185 ) Interest rate swaptions - VA (14 ) (1,469 ) Interest rate swaps - VA (63,710 ) (8,957 ) Total return swaps - VA 6,490 — Embedded derivative - GLWB 56,292 33,632 Total derivatives related to VA contracts (19,829 ) (50,604 ) Derivatives related to FIA contracts: Embedded derivative - FIA 11,330 (12,411 ) Equity futures - FIA (161 ) 297 Equity options - FIA (4,669 ) 10,700 Total derivatives related to FIA contracts 6,500 (1,414 ) Derivatives related to IUL contracts: Embedded derivative - IUL 9,884 (2,090 ) Equity futures - IUL 136 (799 ) Equity options - IUL (1,250 ) 2,891 Total derivatives related to IUL contracts 8,770 2 Embedded derivative - Modco reinsurance treaties 82,658 (17,865 ) Other derivatives (40 ) 3 Total realized gains (losses) - derivatives $ 78,059 $ (69,878 )
Components of the Gain or Loss on Derivatives that Qualify as a Cash Flow Hedging Relationship	The following table presents the components of the gain or loss on derivatives that qualify as a cash flow hedging relationship. Gain (Loss) on Derivatives in Cash Flow Hedging Relationship Amount of Gains (Losses) Deferred in Accumulated Other Comprehensive Income (Loss) on Derivatives Amount and Location of Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss) Amount and Location of (Losses) Recognized in Income (Loss) on Derivatives (Effective Portion) (Effective Portion) (Ineffective Portion) Benefits and settlement Realized investment expenses gains (losses) (Dollars In Thousands) For The Three Months Ended March 31, 2018 Foreign currency swaps $ 615 $ (113 ) $ — Total $ 615 $ (113 ) $ — For The Three Months Ended March 31, 2017 Foreign currency swaps $ (1,034 ) $ (205 ) $ — Total $ (1,034 ) $ (205 ) $ —
Information about the Nature and Accounting Treatment of the Company's Primary Derivative Financial Instruments and Location in and Effect on the Financial Statements	The table below presents information about the nature and accounting treatment of the Company’s primary derivative financial instruments and the location in and effect on the consolidated condensed financial statements for the periods presented below: As of March 31, 2018 December 31, 2017 Notional Amount Fair Value Notional Amount Fair Value (Dollars In Thousands) Other long-term investments Cash flow hedges: Foreign currency swaps $ 117,178 $ 12,131 $ 117,178 $ 6,016 Derivatives not designated as hedging instruments: Interest rate swaps 1,065,000 25,943 1,265,000 55,411 Total return swaps 448,872 18,678 190,938 135 Embedded derivative - Modco reinsurance treaties 64,798 497 64,472 1,009 Embedded derivative - GLWB 5,264,710 143,855 4,897,069 134,995 Interest rate futures 375,718 8,059 1,071,870 3,178 Equity futures 272,807 11,218 62,266 154 Currency futures 150,801 1,127 1,117 2 Equity options 5,168,294 365,097 4,436,467 403,961 Interest rate swaptions 225,000 — 225,000 14 Other 157 160 157 200 $ 13,153,335 $ 586,765 $ 12,331,534 $ 605,075 Other liabilities Derivatives not designated as hedging instruments: Interest rate swaps $ 997,500 $ 12,157 $ 597,500 $ 2,960 Total return swaps — — 243,388 318 Embedded derivative - Modco reinsurance treaties 2,375,807 126,090 2,390,539 215,247 Embedded derivative - GLWB 4,378,592 199,322 4,718,311 246,755 Embedded derivative - FIA 2,109,420 218,340 1,951,650 218,676 Embedded derivative - IUL 186,173 77,350 168,349 80,212 Interest rate futures 872,564 4,630 230,404 917 Equity futures 95,918 1,288 318,795 2,593 Currency futures 95,062 971 255,248 2,087 Equity options 3,623,922 177,557 3,112,812 237,807 $ 14,734,958 $ 817,705 $ 13,986,996 $ 1,007,572

OFFSETTING OF ASSETS AND LIAB32

OFFSETTING OF ASSETS AND LIABILITIES (Tables)	3 Months Ended
	Mar. 31, 2018
Offsetting [Abstract]
Schedule of Derivative Instruments by Assets	The tables below present the derivative instruments by assets and liabilities for the Company as of March 31, 2018 : Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Financial Instruments Collateral Received Net Amount (Dollars In Thousands) Offsetting of Assets Derivatives: Free-Standing derivatives $ 442,253 $ — $ 442,253 $ 194,876 $ 126,320 $ 121,057 Total derivatives, subject to a master netting arrangement or similar arrangement 442,253 — 442,253 194,876 126,320 121,057 Derivatives not subject to a master netting arrangement or similar arrangement Embedded derivative - Modco reinsurance treaties 497 — 497 — — 497 Embedded derivative - GLWB 143,855 — 143,855 — — 143,855 Other 160 — 160 — — 160 Total derivatives, not subject to a master netting arrangement or similar arrangement 144,512 — 144,512 — — 144,512 Total derivatives 586,765 — 586,765 194,876 126,320 265,569 Total Assets $ 586,765 $ — $ 586,765 $ 194,876 $ 126,320 $ 265,569 The tables below present the derivative instruments by assets and liabilities for the Company as of December 31, 2017 : Gross Amounts of Recognized Assets Gross Amounts Offset in the Statement of Financial Position Net Amounts of Assets Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Financial Instruments Collateral Received Net Amount (Dollars In Thousands) Offsetting of Assets Derivatives: Free-Standing derivatives $ 468,871 $ — $ 468,871 $ 242,105 $ 108,830 $ 117,936 Total derivatives, subject to a master netting arrangement or similar arrangement 468,871 — 468,871 242,105 108,830 117,936 Derivatives not subject to a master netting arrangement or similar arrangement Embedded derivative - Modco reinsurance treaties 1,009 — 1,009 — — 1,009 Embedded derivative - GLWB 134,995 — 134,995 — — 134,995 Other 200 — 200 — — 200 Total derivatives, not subject to a master netting arrangement or similar arrangement 136,204 — 136,204 — — 136,204 Total derivatives 605,075 — 605,075 242,105 108,830 254,140 Total Assets $ 605,075 $ — $ 605,075 $ 242,105 $ 108,830 $ 254,140
Schedule of Derivative Instruments by Liabilities	Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Position Net Amounts of Liabilities Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Financial Instruments Collateral Posted Net Amount (Dollars In Thousands) Offsetting of Liabilities Derivatives: Free-Standing derivatives $ 246,682 $ — $ 246,682 $ 242,105 $ 4,577 $ — Total derivatives, subject to a master netting arrangement or similar arrangement 246,682 — 246,682 242,105 4,577 — Derivatives not subject to a master netting arrangement or similar arrangement Embedded derivative - Modco reinsurance treaties 215,247 — 215,247 — — 215,247 Embedded derivative - GLWB 246,755 — 246,755 — — 246,755 Embedded derivative - FIA 218,676 — 218,676 — — 218,676 Embedded derivative - IUL 80,212 — 80,212 — — 80,212 Total derivatives, not subject to a master netting arrangement or similar arrangement 760,890 — 760,890 — — 760,890 Total derivatives 1,007,572 — 1,007,572 242,105 4,577 760,890 Repurchase agreements (1) 885,000 — 885,000 — — 885,000 Total Liabilities $ 1,892,572 $ — $ 1,892,572 $ 242,105 $ 4,577 $ 1,645,890 (1) Borrowings under repurchase agreements are for a term less than 90 days. Gross Amounts of Recognized Liabilities Gross Amounts Offset in the Statement of Financial Position Net Amounts of Liabilities Presented in the Statement of Financial Position Gross Amounts Not Offset in the Statement of Financial Position Financial Instruments Collateral Posted Net Amount (Dollars In Thousands) Offsetting of Liabilities Derivatives: Free-Standing derivatives $ 196,603 $ — $ 196,603 $ 194,876 $ 1,727 $ — Total derivatives, subject to a master netting arrangement or similar arrangement 196,603 — 196,603 194,876 1,727 — Derivatives not subject to a master netting arrangement or similar arrangement Embedded derivative - Modco reinsurance treaties 126,090 — 126,090 — — 126,090 Embedded derivative - GLWB 199,322 — 199,322 — — 199,322 Embedded derivative - FIA 218,340 — 218,340 — — 218,340 Embedded derivative - IUL 77,350 — 77,350 — — 77,350 Total derivatives, not subject to a master netting arrangement or similar arrangement 621,102 — 621,102 — — 621,102 Total derivatives 817,705 — 817,705 194,876 1,727 621,102 Repurchase agreements (1) 665,000 — 665,000 — — 665,000 Total Liabilities $ 1,482,705 $ — $ 1,482,705 $ 194,876 $ 1,727 $ 1,286,102 (1) Borrowings under repurchase agreements are for a term less than 90 days.

MORTGAGE LOANS (Tables)

MORTGAGE LOANS (Tables)	3 Months Ended
	Mar. 31, 2018
MORTGAGE LOANS
Schedule of an Analysis of the Delinquent Loans	An analysis of the delinquent loans is shown in the following chart. Greater 30-59 Days 60-89 Days than 90 Days Total As of March 31, 2018 Delinquent Delinquent Delinquent Delinquent (Dollars In Thousands) Commercial mortgage loans $ 814 $ — $ — $ 814 Number of delinquent commercial mortgage loans 1 — — 1 As of December 31, 2017 Commercial mortgage loans $ 1,817 $ — $ — $ 1,817 Number of delinquent commercial mortgage loans 2 — — 2
Schedule of Loans in Troubled Debt Restructuring	Mortgage loans that were modified in a troubled debt restructuring as of March 31, 2018 and December 31, 2017 were as follows: Number of Contracts Pre-Modification Outstanding Recorded Investment Post-Modification Outstanding Recorded Investment (Dollars In Thousands) As of March 31, 2018 Troubled debt restructuring: Commercial mortgage loans 0 $ — $ — As of December 31, 2017 Troubled debt restructuring: Commercial mortgage loans 1 $ 418 $ 418

DEBT AND OTHER OBLIGATIONS (Tab

DEBT AND OTHER OBLIGATIONS (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Summary of Debt and Subordinated Debt Securities	Debt and subordinated debt securities are summarized as follows: As of March 31, 2018 December 31, 2017 Outstanding Principal Carrying Amounts Outstanding Principal Carrying Amounts (Dollars In Thousands) Debt (year of issue): Credit Facility $ 325,000 $ 325,000 $ — $ — Capital lease obligation 1,591 1,591 1,682 1,682 6.40% Senior Notes (2007), due 2018 — — 150,000 150,518 7.375% Senior Notes (2009), due 2019 400,000 431,015 400,000 435,806 8.45% Senior Notes (2009), due 2039 221,516 338,762 232,928 357,046 $ 948,107 $ 1,096,368 $ 784,610 $ 945,052 Subordinated debt securities (year of issue): 5.35% Subordinated Debentures (2017), due 2052 $ 500,000 $ 495,324 $ 500,000 $ 495,289 $ 500,000 $ 495,324 $ 500,000 $ 495,289
Non-recourse Funding Obligations Outstanding	Non-recourse funding obligations outstanding as of March 31, 2018 , on a consolidated basis, are shown in the following table: Issuer Outstanding Principal Carrying Value (1) Maturity Year-to-Date (Dollars In Thousands) Golden Gate Captive Insurance Company (2)(3) $ 1,981,000 $ 1,981,000 2039 4.75 % Golden Gate II Captive Insurance Company 58,600 49,464 2052 4.29 % Golden Gate V Vermont Captive Insurance Company (2)(3) 635,000 695,836 2037 5.12 % MONY Life Insurance Company (3) 1,091 2,389 2024 6.19 % Total $ 2,675,691 $ 2,728,689 (1) Carrying values include premiums and discounts and do not represent unpaid principal balances. (2) Obligations are issued to non-consolidated subsidiaries of the Company. These obligations collateralize certain held-to-maturity securities issued by wholly owned subsidiaries of PLICO. (3) Fixed rate obligations Non-recourse funding obligations outstanding as of December 31, 2017 , on a consolidated basis, are shown in the following table: Issuer Outstanding Principal Carrying Value (1) Maturity Year Year-to-Date Weighted-Avg Interest Rate (Dollars In Thousands) Golden Gate Captive Insurance Company (2)(3) $ 2,014,000 $ 2,014,000 2039 4.75 % Golden Gate II Captive Insurance Company 58,600 49,787 2052 3.88 % Golden Gate V Vermont Captive Insurance Company (2)(3) 620,000 681,285 2037 5.12 % MONY Life Insurance Company (3) 1,091 2,405 2024 6.19 % Total $ 2,693,691 $ 2,747,477 (1) Carrying values include premiums and discounts and do not represent unpaid principal balances. (2) Obligations are issued to non-consolidated subsidiaries of the Company. These obligations collateralize certain held-to-maturity securities issued by wholly owned subsidiaries of PLICO. (3) Fixed rate obligations
Schedule of Collateral Pledged for Repurchase Agreements	The following table provides the amount by asset class of securities of collateral pledged for repurchase agreements and securities that have been loaned as part of securities lending transactions as of March 31, 2018 and December 31, 2017: Repurchase Agreements, Securities Lending Transactions, and Repurchase-to-Maturity Transactions Accounted for as Secured Borrowings Remaining Contractual Maturity of the Agreements As of March 31, 2018 (Dollars In Thousands) Overnight and Up to 30 days 30-90 days Greater Than Total Repurchase agreements and repurchase-to-maturity transactions U.S. Treasury and agency securities $ 293,539 $ — $ — $ — $ 293,539 Other asset-backed securities — — — — — Mortgage loans 460,072 — — — 460,072 Total repurchase agreements and repurchase-to-maturity transactions 753,611 — — — 753,611 Securities lending transactions Corporate securities 94,155 — — — 94,155 Equity securities 12,798 — — — 12,798 Redeemable preferred stock 75 — — — 75 Total securities lending transactions 107,028 — — — 107,028 Total securities $ 860,639 $ — $ — $ — $ 860,639 Repurchase Agreements, Securities Lending Transactions, and Repurchase-to-Maturity Transactions Accounted for as Secured Borrowings Remaining Contractual Maturity of the Agreements As of December 31, 2017 (Dollars In Thousands) Overnight and Up to 30 days 30-90 days Greater Than Total Repurchase agreements and repurchase-to-maturity transactions U.S. Treasury and agency securities $ 307,633 $ — $ — $ — $ 307,633 Corporate securities — — — — — Mortgage loans 698,974 — — — 698,974 Total securities $ 1,006,607 $ — $ — $ — $ 1,006,607 Securities lending transactions Corporate securities $ 118,817 $ — $ — $ — $ 118,817 Equity securities 5,699 — — — 5,699 Redeemable preferred stock 755 — — — 755 Total securities lending transactions 125,271 — — — 125,271 Total securities $ 1,131,878 $ — $ — $ — $ 1,131,878

EMPLOYEE BENEFIT PLANS (Tables)

EMPLOYEE BENEFIT PLANS (Tables)	3 Months Ended
	Mar. 31, 2018
Pension and Other Postretirement Benefits Cost (Reversal of Cost) [Abstract]
Components of the Net Periodic Benefit Cost of the Company's Defined Benefit Pension Plan and Unfunded Excess Benefit Plan	Components of the net periodic benefit cost for the three months ended March 31, 2018 and 2017 , are as follows: For The 2018 2017 Qualified Nonqualified Qualified Pension Plan Nonqualified Excess Pension Plan (Dollars In Thousands) Service cost — benefits earned during the period $ 3,441 $ 387 $ 3,348 $ 334 Interest cost on projected benefit obligation 2,397 359 2,191 297 Expected return on plan assets (4,026 ) — (3,352 ) — Amortization of prior service cost — — — — Amortization of actuarial loss/(gain) — 265 — 118 Preliminary net periodic benefit cost 1,812 1,011 2,187 749 Settlement/curtailment expense — — — — Total net periodic benefit costs $ 1,812 $ 1,011 $ 2,187 $ 749

ACCUMULATED OTHER COMPREHENSI36

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables)	3 Months Ended
	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Summary of Changes in the Accumulated Balances for Each Component of AOCI	The following tables summarize the changes in the accumulated balances for each component of accumulated other comprehensive income (loss) (“AOCI”) as of March 31, 2018 and December 31, 2017 . Changes in Accumulated Other Comprehensive Income (Loss) by Component Unrealized (2) Accumulated Minimum Pension Liability Adjustment Total (Dollars In Thousands, Net of Tax) Beginning Balance, December 31, 2017 $ 25,874 $ 747 $ (13,925 ) $ 12,696 Other comprehensive income (loss) before reclassifications (577,712 ) 487 — (577,225 ) Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings 681 — — 681 Amounts reclassified from accumulated other comprehensive income (loss) (1) 11 89 — 100 Net current-period other comprehensive income (loss) (577,020 ) 576 — (576,444 ) Cumulative effect adjustments (10,552 ) — — (10,552 ) Ending Balance, March 31, 2018 $ (561,698 ) $ 1,323 $ (13,925 ) $ (574,300 ) (1) See Reclassification table below for details. (2) As of March 31, 2018, net unrealized losses reported in AOCI were offset by $340.2 million due to the impact those net unrealized losses would have had on certain of the Company’s insurance assets and liabilities if the net unrealized losses had been recognized in net income. Changes in Accumulated Other Comprehensive Income (Loss) by Component Unrealized (2) Accumulated Minimum Pension Liability Adjustment Total (Dollars In Thousands, Net of Tax) Beginning Balance, December 31, 2016 $ (656,322 ) $ 727 $ 1,072 $ (654,523 ) Other comprehensive income (loss) before reclassifications 700,536 (563 ) (15,726 ) 684,247 Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings 7,153 — — 7,153 Amounts reclassified from accumulated other (1) 642 451 501 1,594 Net current-period other comprehensive income (loss) 708,331 (112 ) (15,225 ) 692,994 Cumulative effect adjustments (26,135 ) 132 228 (25,775 ) Ending Balance, December 31, 2017 $ 25,874 $ 747 $ (13,925 ) $ 12,696 (1) See Reclassification table below for details. (2) As of December 31, 2016 and December 31, 2017, net unrealized losses reported in AOCI were offset by $424.1 million and $(6.3) million, respectively, due to the impact those net unrealized losses would have had on certain of the Company’s insurance assets and liabilities if the net unrealized losses had been recognized in net income.
Schedule of Reclassifications Amounts Out of AOCI	The following tables summarize the reclassifications amounts out of AOCI for the three months ended March 31, 2018 and 2017 . Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount Other Comprehensive Affected Line Item in the For The Three Months Ended March 31, 2018 Income (Loss) Consolidated Condensed Statements of Income (Dollars In Thousands) Gains and losses on derivative instruments Net settlement (expense)/benefit (1) $ (113 ) Benefits and settlement expenses, net of reinsurance ceded (113 ) Total before tax 24 Tax (expense) or benefit $ (89 ) Net of tax Unrealized gains and losses on available-for-sale securities Net investment gains (losses) $ 2,783 Realized investment gains (losses): All other investments Impairments recognized in earnings (3,645 ) Net impairment losses recognized in earnings (862 ) Total before tax 181 Tax (expense) or benefit $ (681 ) Net of tax (1) See Note 6, Derivative Financial Instruments for additional information Reclassifications Out of Accumulated Other Comprehensive Income (Loss) Amount Other Comprehensive Affected Line Item in the For The Three Months Ended March 31, 2017 Income (Loss) Consolidated Condensed Statements of Income (Dollars In Thousands) Gains and losses on derivative instruments Net settlement (expense)/benefit (1) $ (205 ) Benefits and settlement expenses, net of reinsurance ceded (205 ) Total before tax 72 Tax (expense) or benefit $ (133 ) Net of tax Unrealized gains and losses on available-for-sale securities Net investment gains (losses) $ 9,481 Realized investment gains (losses): All other investments Impairments recognized in earnings (7,831 ) Net impairment losses recognized in earnings 1,650 Total before tax (578 ) Tax (expense) or benefit $ 1,072 Net of tax

INCOME TAXES (Tables)

INCOME TAXES (Tables)	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Schedule of Effective Income Tax Rate Reconciliation	The Company's effective tax rate related to continuing operations varied from the maximum federal income tax rates as follows: For The Three Months Ended March 31, 2018 2017 Statutory federal income tax rate applied to pre-tax income 21.0 % 35.0 % State income taxes 1.2 0.6 Investment income not subject to tax (2.8 ) (3.2 ) Unrealized tax positions — 0.5 Other (0.1 ) — 19.3 % 32.9 %

OPERATING SEGMENTS (Tables)

OPERATING SEGMENTS (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Summary of Financial Information for the Company's Segments	The following tables present a summary of results and reconciles pre-tax adjusted operating income (loss) to consolidated income before income tax and net income: For The 2018 2017 (Dollars In Thousands) Revenues Life Marketing $ 434,916 $ 421,392 Acquisitions 379,094 401,367 Annuities 150,713 108,642 Stable Value Products 53,868 40,843 Asset Protection 76,375 80,083 Corporate and Other 70,866 52,970 Total revenues $ 1,165,832 $ 1,105,297 Pre-tax Adjusted Operating Income (Loss) Life Marketing $ (17,849 ) $ 18,945 Acquisitions 55,520 53,667 Annuities 40,531 53,007 Stable Value Products 29,080 23,899 Asset Protection 6,218 5,599 Corporate and Other (20,679 ) (19,728 ) Pre-tax adjusted operating income 92,821 135,389 Realized (losses) gains on investments and derivatives (1,023 ) (23,040 ) Income before income tax 91,798 112,349 Income tax expense (17,686 ) (36,935 ) Net income $ 74,112 $ 75,414 Pre-tax adjusted operating income $ 92,821 $ 135,389 Adjusted operating income tax (expense) benefit (18,044 ) (44,999 ) After-tax adjusted operating income 74,777 90,390 Realized (losses) gains on investments and derivatives (1,023 ) (23,040 ) Income tax benefit (expense) on adjustments 358 8,064 Net income $ 74,112 $ 75,414 Realized investment (losses) gains: Derivative financial instruments $ 78,059 $ (69,878 ) All other investments (87,599 ) 22,841 Net impairment losses recognized in earnings (3,645 ) (7,831 ) Less: related amortization (1) 9,156 (10,744 ) Less: VA GLWB economic cost (21,318 ) (21,084 ) Realized (losses) gains on investments and derivatives $ (1,023 ) $ (23,040 ) (1) Includes amortization of DAC/VOBA and benefits and settlement expenses that are impacted by realized gains (losses). Operating Segment Assets (Dollars In Thousands) Life Marketing Acquisitions Annuities Stable Value Products Investments and other assets $ 14,744,343 $ 19,275,508 $ 20,535,539 $ 4,571,793 DAC and VOBA 1,374,149 90,466 800,941 6,133 Other intangibles 277,489 33,909 166,784 7,889 Goodwill 200,274 14,524 336,677 113,813 Total assets $ 16,596,255 $ 19,414,407 $ 21,839,941 $ 4,699,628 Asset Protection Corporate and Other Total Consolidated Investments and other assets $ 1,016,586 $ 13,988,814 $ 74,132,583 DAC and VOBA 162,465 — 2,434,154 Other intangibles 130,573 35,063 651,707 Goodwill 128,182 — 793,470 Total assets $ 1,437,806 $ 14,023,877 $ 78,011,914 Operating Segment Assets (Dollars In Thousands) Life Marketing Acquisitions Annuities Stable Value Products Investments and other assets $ 14,914,418 $ 19,588,133 $ 20,938,409 $ 4,569,639 DAC and VOBA 1,320,776 74,862 772,634 6,864 Other intangibles 282,361 34,548 170,117 8,056 Goodwill 200,274 14,524 336,677 113,813 Total assets $ 16,717,829 $ 19,712,067 $ 22,217,837 $ 4,698,372 Asset Protection Corporate and Other Total Consolidated Investments and other assets $ 918,952 $ 15,043,597 $ 75,973,148 DAC and VOBA 24,441 — 2,199,577 Other intangibles 133,234 35,256 663,572 Goodwill 128,182 — 793,470 Total assets $ 1,204,809 $ 15,078,853 $ 79,629,767

SUMMARY OF SIGNIFICANT ACCOUN39

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings	$ 1,412,583		$ 1,560,444
Cumulative effect adjustments			(92,525)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Retained earnings		$ (92,500)
Retained Earnings
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect adjustments			(81,973)
Retained Earnings | Accounting Standards Update 2016-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect adjustments		10,600
Accumulated Other Comprehensive Income (Loss)
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect adjustments			$ (10,552)
Accumulated Other Comprehensive Income (Loss) | Accounting Standards Update 2016-01
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative effect adjustments		$ (10,600)

SUMMARY OF SIGNIFICANT ACCOUN40

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Schedule of Effect of New Accounting Pronouncements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Balance Sheet
Deferred policy acquisition costs and value of business acquired	$ 2,434,154		$ 2,199,577
Other liabilities	2,454,942		$ 2,353,565
Statements of Income
Other income	114,411	$ 109,242
Amortization of deferred policy acquisition costs and value of business acquired	57,981	20,519
Other operating expenses, net of reinsurance ceded	229,251	$ 222,787
Before ASC 606
Balance Sheet
Deferred policy acquisition costs and value of business acquired	2,295,200
Other liabilities	2,193,300
Statements of Income
Other income	113,200
Amortization of deferred policy acquisition costs and value of business acquired	44,200
Other operating expenses, net of reinsurance ceded	$ 243,500

MONY CLOSED BLOCK OF BUSINESS -

MONY CLOSED BLOCK OF BUSINESS - Summary of Financial Information for the Closed Block (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017	Dec. 31, 2016
Closed block liabilities
Future policy benefits, policyholders’ account balances and other policyholder liabilities	$ 5,760,621	$ 5,791,867
Policyholder dividend obligation	0	160,712	$ 41,180	$ 31,932
Other liabilities	34,796	30,764
Total closed block liabilities	5,795,417	5,983,343
Closed block assets
Fixed maturities, available-for-sale, at fair value	4,497,521	4,669,856
Mortgage loans on real estate	107,826	108,934
Policy loans	692,632	700,769
Cash	39,464	31,182
Other assets	113,120	122,637
Total closed block assets	5,450,563	5,633,378
Excess of reported closed block liabilities over closed block assets	344,854	349,965
Portion of above representing accumulated other comprehensive income:
Net unrealized investment gains (losses) net of policyholder dividend obligation: $(162,429) and $(13,429); and net of income tax: $34,911 and $2,820	(3,014)	0
Future earnings to be recognized from closed block assets and closed block liabilities	341,840	349,965
Policyholder dividend obligations	(162,429)	(13,429)
Deferred income tax expense (benefit)	$ 34,911	$ 2,820

MONY CLOSED BLOCK OF BUSINESS42

MONY CLOSED BLOCK OF BUSINESS - Schedule of Reconciliation of the Policyholder Dividend Obligation (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Movement in Closed Block Dividend Obligation [Roll Forward]
Policyholder dividend obligation, beginning of period	$ 160,712	$ 31,932
Applicable to net revenue (losses)	(11,712)	(16,753)
Change in net unrealized investment gains (losses) allocated to the policyholder dividend obligation	(149,000)	26,001
Policyholder dividend obligation, end of period	$ 0	$ 41,180

MONY CLOSED BLOCK OF BUSINESS43

MONY CLOSED BLOCK OF BUSINESS - Schedule of Closed Block Revenues and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues
Premiums and other income	$ 39,612	$ 42,836
Net investment income	50,543	51,359
Net investment gains	(237)	63
Total revenues	89,918	94,258
Benefits and other deductions
Benefits and settlement expenses	79,952	80,108
Other operating expenses	(319)	166
Total benefits and other deductions	79,633	80,274
Net revenues before income taxes	10,285	13,984
Income tax expense	2,160	4,895
Net revenues	$ 8,125	$ 9,089

INVESTMENT OPERATIONS - Summary

INVESTMENT OPERATIONS - Summary of Net Realized Investment Gains (Losses) for all Other Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Fixed maturities	$ 2,783	$ 9,490
Equity gains and losses	(8,786)	(9)
Impairments	(3,645)	(7,831)
Modco trading portfolio	(84,709)	18,552
Other investments	3,113	(5,192)
Total realized gains (losses) - investments	$ (91,244)	$ 15,010

INVESTMENT OPERATIONS - Schedul

INVESTMENT OPERATIONS - Schedule of Gross Realized Gains (Losses) on Investments Available-for-Sale (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Gross realized gains	$ 8,049	$ 10,738
Gross realized losses:
Impairment losses	(3,645)	(7,831)
Other realized losses	$ (5,267)	$ (1,257)

INVESTMENT OPERATIONS - Sched46

INVESTMENT OPERATIONS - Schedule of Fair Value (Proceeds) and Gains (Losses) Realized on Securities Sold in an Unrealized Gain/Loss Position (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Securities in an unrealized gain position:
Fair value (proceeds)	$ 142,133	$ 169,134
Gains realized	8,049	10,738
Securities in an Unrealized Loss Positions [Abstract]
Fair value (proceeds)	56,984	12,452
Losses realized	$ (5,267)	$ (1,257)

INVESTMENT OPERATIONS - Sched47

INVESTMENT OPERATIONS - Schedule of Realized Gain(Losses) on Equity Securities Sold (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Net gains (losses) recognized during the period on equity securities	$ (8,786)	$ (9)
Less: net gains (losses) recognized on equity securities sold during the period	(1,702)
Gains (losses) recognized during the period on equity securities still held	$ (7,084)

INVESTMENT OPERATIONS - Sched48

INVESTMENT OPERATIONS - Schedule of Amortized Cost and Fair Value of the Company's Investments Classified as Available-for-Sale (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Investment [Line Items]
Amortized Cost	$ 38,949,464	$ 39,783,880
Gross Unrealized Gains	302,253	718,229
Gross Unrealized Losses	(1,444,019)	(682,181)
Fair Value	37,807,698	39,819,928
Total OTTI Recognized in OCI	14	(28)
Residential mortgage-backed securities
Investment [Line Items]
Amortized Cost	2,430,278	2,330,832
Gross Unrealized Gains	11,723	19,413
Gross Unrealized Losses	(47,631)	(23,033)
Fair Value	2,394,370	2,327,212
Total OTTI Recognized in OCI	14	10
Commercial mortgage-backed securities
Investment [Line Items]
Amortized Cost	1,899,618	1,914,998
Gross Unrealized Gains	583	5,010
Gross Unrealized Losses	(58,695)	(30,186)
Fair Value	1,841,506	1,889,822
Total OTTI Recognized in OCI	0	0
Other asset-backed securities
Investment [Line Items]
Amortized Cost	1,238,929	1,234,376
Gross Unrealized Gains	15,376	20,936
Gross Unrealized Losses	(9,653)	(5,763)
Fair Value	1,244,652	1,249,549
Total OTTI Recognized in OCI	0	0
U.S. government-related securities
Investment [Line Items]
Amortized Cost	1,377,633	1,255,244
Gross Unrealized Gains	168	185
Gross Unrealized Losses	(50,001)	(32,177)
Fair Value	1,327,800	1,223,252
Total OTTI Recognized in OCI	0	0
Other government-related securities
Investment [Line Items]
Amortized Cost	282,664	282,767
Gross Unrealized Gains	6,421	9,463
Gross Unrealized Losses	(11,626)	(4,948)
Fair Value	277,459	287,282
Total OTTI Recognized in OCI	0	0
States, municipals, and political subdivisions
Investment [Line Items]
Amortized Cost	1,767,604	1,770,299
Gross Unrealized Gains	6,162	16,959
Gross Unrealized Losses	(73,487)	(45,613)
Fair Value	1,700,279	1,741,645
Total OTTI Recognized in OCI	0	(37)
Corporate securities
Investment [Line Items]
Amortized Cost	29,487,086	29,606,484
Gross Unrealized Gains	261,484	623,713
Gross Unrealized Losses	(1,188,797)	(528,187)
Fair Value	28,559,773	29,702,010
Total OTTI Recognized in OCI	0	(1)
Preferred stock
Investment [Line Items]
Amortized Cost	94,362	94,362
Gross Unrealized Gains	336	232
Gross Unrealized Losses	(4,129)	(3,503)
Fair Value	90,569	91,091
Total OTTI Recognized in OCI	0	0
Fixed maturities
Investment [Line Items]
Amortized Cost	38,578,174	38,489,362
Gross Unrealized Gains	302,253	695,911
Gross Unrealized Losses	(1,444,019)	(673,410)
Fair Value	37,436,408	38,511,863
Total OTTI Recognized in OCI	14	(28)
Equity securities
Investment [Line Items]
Amortized Cost		735,569
Gross Unrealized Gains		22,318
Gross Unrealized Losses		(8,771)
Fair Value		749,116
Total OTTI Recognized in OCI		0
Short-term investments
Investment [Line Items]
Amortized Cost	371,290	558,949
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	371,290	558,949
Total OTTI Recognized in OCI	$ 0	$ 0

INVESTMENT OPERATIONS - Sched49

INVESTMENT OPERATIONS - Schedule of Fair Value of Trading Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Trading Securities [Line Items]
Trading securities	$ 2,662,999	$ 2,725,694
Residential mortgage-backed securities
Trading Securities [Line Items]
Trading securities	265,547	259,694
Commercial mortgage-backed securities
Trading Securities [Line Items]
Trading securities	146,633	146,804
Other asset-backed securities
Trading Securities [Line Items]
Trading securities	129,714	138,097
U.S. government-related securities
Trading Securities [Line Items]
Trading securities	37,575	27,234
Other government-related securities
Trading Securities [Line Items]
Trading securities	40,368	63,925
States, municipals, and political subdivisions
Trading Securities [Line Items]
Trading securities	318,142	326,925
Corporate securities
Trading Securities [Line Items]
Trading securities	1,645,899	1,698,183
Preferred stock
Trading Securities [Line Items]
Trading securities	3,264	3,327
Fixed maturities
Trading Securities [Line Items]
Trading securities	2,587,142	2,664,189
Equity securities
Trading Securities [Line Items]
Trading securities	5,366	5,244
Short-term investments
Trading Securities [Line Items]
Trading securities	$ 70,491	$ 56,261

INVESTMENT OPERATIONS - Sched50

INVESTMENT OPERATIONS - Schedule of Amortized Cost and Fair Value of Available-for-Sale and Held-to-Maturity Fixed Maturities, by Expected Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Held-to-maturity, Fair Value
Fair Value	$ 2,674,129	$ 2,776,327
Fixed maturities
Available-for-sale, Amortized Cost
Due in one year or less	912,935
Due after one year through five years	7,026,832
Due after five years through ten years	6,881,555
Due after ten years	23,756,852
Amortized Cost	38,578,174
Available-for-sale, Fair Value
Due in one year or less	909,757
Due after one year through five years	6,915,584
Due after five years through ten years	6,721,386
Due after ten years	22,889,681
Fair Value	37,436,408
Held-to-maturity, Amortized Cost
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	0
Due after ten years	2,699,826
Amortized Cost	2,699,826	2,718,904
Held-to-maturity, Fair Value
Due in one year or less	0
Due after one year through five years	0
Due after five years through ten years	0
Due after ten years	2,674,129
Fair Value	$ 2,674,129	$ 2,776,327

INVESTMENT OPERATIONS - Sched51

INVESTMENT OPERATIONS - Schedule of Other-than-Temporary Impairments of Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Investment [Line Items]
Other-than-temporary impairments		$ (2,725)
Non-credit impairment losses recorded in other comprehensive income		(5,106)
Net impairment losses recognized in earnings	$ (3,645)	(7,831)
Fixed maturities
Investment [Line Items]
Other-than-temporary impairments	(691)	(95)
Non-credit impairment losses recorded in other comprehensive income	(2,954)	(5,106)
Net impairment losses recognized in earnings	$ (3,645)	(5,201)
Equity securities
Investment [Line Items]
Other-than-temporary impairments		(2,630)
Non-credit impairment losses recorded in other comprehensive income		0
Net impairment losses recognized in earnings		$ (2,630)

INVESTMENT OPERATIONS - Sched52

INVESTMENT OPERATIONS - Schedule of Available-for-Sale Credit Losses on Fixed Maturities Held by the Company for Which a Portion of Other-than-Temporary Impairments were Recognized in Other Comprehensive Income (Loss) (Details) - Fixed maturities - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward]
Beginning balance	$ 3,268	$ 12,685
Additions for newly impaired securities	0	0
Additions for previously impaired securities	0	0
Reductions for previously impaired securities due to a change in expected cash flows	(1,033)	(12,685)
Reductions for previously impaired securities that were sold in the current period	0	0
Ending balance	$ 2,235	$ 0

INVESTMENT OPERATIONS - Sched53

INVESTMENT OPERATIONS - Schedule of Investments' Gross Unrealized Losses and Fair Value of the Company's Investments that are Not Deemed to be Other-than-Temporarily Impaired (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Fair Value
Less Than 12 Months	$ 15,661,373	$ 7,062,734
12 Months or More	13,889,280	14,639,347
Total	29,550,653	21,702,081
Unrealized Loss
Less Than 12 Months	(412,923)	(79,496)
12 Months or More	(1,031,096)	(602,685)
Total	(1,444,019)	(682,181)
Residential mortgage-backed securities
Fair Value
Less Than 12 Months	1,426,703	766,599
12 Months or More	394,955	416,221
Total	1,821,658	1,182,820
Unrealized Loss
Less Than 12 Months	(29,466)	(9,671)
12 Months or More	(18,165)	(13,362)
Total	(47,631)	(23,033)
Commercial mortgage-backed securities
Fair Value
Less Than 12 Months	984,307	757,471
12 Months or More	756,845	796,456
Total	1,741,152	1,553,927
Unrealized Loss
Less Than 12 Months	(24,232)	(8,592)
12 Months or More	(34,463)	(21,594)
Total	(58,695)	(30,186)
Other asset-backed securities
Fair Value
Less Than 12 Months	143,917	86,506
12 Months or More	129,840	134,316
Total	273,757	220,822
Unrealized Loss
Less Than 12 Months	(1,784)	(322)
12 Months or More	(7,869)	(5,441)
Total	(9,653)	(5,763)
U.S. government-related securities
Fair Value
Less Than 12 Months	145,876	94,110
12 Months or More	1,054,322	1,072,232
Total	1,200,198	1,166,342
Unrealized Loss
Less Than 12 Months	(3,108)	(688)
12 Months or More	(46,893)	(31,489)
Total	(50,001)	(32,177)
Other government-related securities
Fair Value
Less Than 12 Months	90,010	24,830
12 Months or More	112,461	115,294
Total	202,471	140,124
Unrealized Loss
Less Than 12 Months	(4,221)	(169)
12 Months or More	(7,405)	(4,778)
Total	(11,626)	(4,947)
States, municipals, and political subdivisions
Fair Value
Less Than 12 Months	505,864	170,268
12 Months or More	1,007,246	1,027,747
Total	1,513,110	1,198,015
Unrealized Loss
Less Than 12 Months	(10,768)	(1,738)
12 Months or More	(62,719)	(43,874)
Total	(73,487)	(45,612)
Corporate securities
Fair Value
Less Than 12 Months	12,307,646	5,054,316
12 Months or More	10,410,752	10,962,689
Total	22,718,398	16,017,005
Unrealized Loss
Less Than 12 Months	(337,936)	(55,795)
12 Months or More	(850,861)	(472,394)
Total	(1,188,797)	(528,189)
Redeemable Preferred stock
Fair Value
Less Than 12 Months	57,050	22,048
12 Months or More	22,859	23,197
Total	79,909	45,245
Unrealized Loss
Less Than 12 Months	(1,408)	(1,120)
12 Months or More	(2,721)	(2,383)
Total	$ (4,129)	(3,503)
Equities
Fair Value
Less Than 12 Months		86,586
12 Months or More		91,195
Total		177,781
Unrealized Loss
Less Than 12 Months		(1,401)
12 Months or More		(7,370)
Total		$ (8,771)

INVESTMENT OPERATIONS - Summa54

INVESTMENT OPERATIONS - Summary of Change in Unrealized Gains (Losses), Net of Income Tax, on Fixed Maturity and Equity Securities, Classified as Available-for-Sale (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fixed maturities
Investment Holdings [Line Items]
Change in unrealized gains (losses), net of income tax	$ (884,219)	$ 224,115

INVESTMENT OPERATIONS - Sched55

INVESTMENT OPERATIONS - Schedule of Amortized Cost and Fair Value of the Company's Investments Classified as Held-to-Maturity (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Investment [Line Items]
Fair Value	$ 2,674,129	$ 2,776,327
Fixed maturities
Investment [Line Items]
Amortized Cost	2,699,826	2,718,904
Gross Unrecognized Holding Gains	30,310	76,586
Gross Unrecognized Holding Losses	(56,007)	(19,163)
Fair Value	2,674,129	2,776,327
Total OTTI Recognized in OCI	0	0
Red Mountain LLC | Fixed maturities
Investment [Line Items]
Amortized Cost	718,826	704,904
Gross Unrecognized Holding Gains	0	0
Gross Unrecognized Holding Losses	(56,007)	(19,163)
Fair Value	662,819	685,741
Total OTTI Recognized in OCI	0	0
Steel City LLC | Fixed maturities
Investment [Line Items]
Amortized Cost	1,981,000	2,014,000
Gross Unrecognized Holding Gains	30,310	76,586
Gross Unrecognized Holding Losses	0	0
Fair Value	2,011,310	2,090,586
Total OTTI Recognized in OCI	$ 0	$ 0

INVESTMENT OPERATIONS - Additio

INVESTMENT OPERATIONS - Additional Information (Details)	Jan. 15, 2016note	Mar. 31, 2018USD ($)positionsubsidiary	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)subsidiary
Investment [Line Items]
Gross unrealized loss greater than twelve months		$ 1,031,096,000		$ 602,685,000
Total positions that were in an unrealized loss position | position		2,428
Fair Value		$ 37,807,698,000		39,819,928,000
Available-for-sale securities, amortized cost		38,949,464,000		39,783,880,000
Trading securities		2,662,999,000		$ 2,725,694,000
Other-than-temporary impairments on held-to-maturity securities		$ 0	$ 0
Red Mountain and Steel City
Investment [Line Items]
Number of wholly owned subsidiaries that were determined to be VIEs | subsidiary		2		2
Red Mountain LLC
Investment [Line Items]
Ownership through an affiliate (as a percent)		100.00%
Risk of loss related to the VIE limited to the entity's investment		$ 10,000
Payments made		$ 0
Steel City LLC
Investment [Line Items]
Ownership through an affiliate (as a percent)		100.00%
Risk of loss related to the VIE limited to the entity's investment		$ 10,000
Payments made		0
Number of notes issued | note	3
Below investment grade
Investment [Line Items]
Fair Value		1,800,000,000
Available-for-sale securities, amortized cost		1,900,000,000
Trading securities		217,200,000
Securities not publicly traded		307,500,000
Fixed maturities
Investment [Line Items]
Other-than-temporary impairments related to fixed maturities or equity securities that the Company intended to sell or expected to be required to sell		0	0
Fair Value		37,436,408,000		$ 38,511,863,000
Available-for-sale securities, amortized cost		38,578,174,000		38,489,362,000
Trading securities		2,587,142,000		2,664,189,000
Gross unrecognized holding gains		30,310,000		76,586,000
Gross unrecognized holding losses		56,007,000		19,163,000
Residential mortgage-backed securities
Investment [Line Items]
Gross unrealized loss greater than twelve months		18,165,000		13,362,000
Fair Value		2,394,370,000		2,327,212,000
Available-for-sale securities, amortized cost		2,430,278,000		2,330,832,000
Trading securities		265,547,000		259,694,000
Commercial mortgage-backed securities
Investment [Line Items]
Gross unrealized loss greater than twelve months		34,463,000		21,594,000
Fair Value		1,841,506,000		1,889,822,000
Available-for-sale securities, amortized cost		1,899,618,000		1,914,998,000
Trading securities		146,633,000		146,804,000
Other asset-backed securities
Investment [Line Items]
Gross unrealized loss greater than twelve months		$ 7,869,000		$ 5,441,000
Percentage of underlying collateral of student-loan backed auction rate securities guaranteed by the Federal Family Education Loan Program (FFELP), minimum		97.00%		97.00%
Fair Value		$ 1,244,652,000		$ 1,249,549,000
Available-for-sale securities, amortized cost		1,238,929,000		1,234,376,000
Trading securities		129,714,000		138,097,000
U.S. government-related securities
Investment [Line Items]
Gross unrealized loss greater than twelve months		46,893,000		31,489,000
Fair Value		1,327,800,000		1,223,252,000
Available-for-sale securities, amortized cost		1,377,633,000		1,255,244,000
Trading securities		37,575,000		27,234,000
Other government-related securities
Investment [Line Items]
Gross unrealized loss greater than twelve months		7,405,000		4,778,000
Fair Value		277,459,000		287,282,000
Available-for-sale securities, amortized cost		282,664,000		282,767,000
Trading securities		40,368,000		63,925,000
States, municipals, and political subdivisions
Investment [Line Items]
Gross unrealized loss greater than twelve months		62,719,000		43,874,000
Fair Value		1,700,279,000		1,741,645,000
Available-for-sale securities, amortized cost		1,767,604,000		1,770,299,000
Trading securities		318,142,000		326,925,000
Corporate securities
Investment [Line Items]
Gross unrealized loss greater than twelve months		850,861,000		472,394,000
Fair Value		28,559,773,000		29,702,010,000
Available-for-sale securities, amortized cost		29,487,086,000		29,606,484,000
Trading securities		1,645,899,000		1,698,183,000
Equity securities
Investment [Line Items]
Other-than-temporary impairments related to fixed maturities or equity securities that the Company intended to sell or expected to be required to sell		0	$ 0
Gross unrealized loss greater than twelve months				7,370,000
Fair Value				749,116,000
Available-for-sale securities, amortized cost				735,569,000
Trading securities		$ 5,366,000		$ 5,244,000

FAIR VALUE OF FINANCIAL INSTR57

FAIR VALUE OF FINANCIAL INSTRUMENTS - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets:
Fixed maturity securities - trading	$ 2,662,999	$ 2,725,694
Total fixed maturity securities	40,023,550	41,176,052
Equity securities	681,520	754,360
Other long-term investments	586,765	605,075
Short-term investments	441,781	615,210
Assets related to separate accounts
Variable annuity	13,549,068	13,956,071
Variable universal life	1,019,250	1,035,202
Fixed maturities
Assets:
Fixed maturity securities - available-for-sale	37,436,408
Fixed maturity securities - trading	2,587,142	2,664,189
Residential mortgage-backed securities
Assets:
Fixed maturity securities - trading	265,547	259,694
Commercial mortgage-backed securities
Assets:
Fixed maturity securities - trading	146,633	146,804
Other asset-backed securities
Assets:
Fixed maturity securities - trading	129,714	138,097
States, municipals, and political subdivisions
Assets:
Fixed maturity securities - trading	318,142	326,925
Other government-related securities
Assets:
Fixed maturity securities - trading	40,368	63,925
Corporate securities
Assets:
Fixed maturity securities - trading	1,645,899	1,698,183
Level 3 | Other asset-backed securities
Assets:
Total investments	503,672	504,228
Level 3 | Corporate securities
Assets:
Total investments	617,724	617,770
Measured at fair value on a recurring basis
Assets:
Total fixed maturity securities	40,023,550	41,176,052
Equity securities	681,520	754,360
Other long-term investments	586,765	605,075
Short-term investments	441,781	615,210
Total investments	41,733,616	43,150,697
Cash	307,724	252,310
Other assets	34,463	28,771
Assets related to separate accounts
Variable annuity	13,549,068	13,956,071
Variable universal life	1,019,250	1,035,202
Total assets measured at fair value on a recurring basis	56,644,121	58,423,051
Liabilities:
Annuity account balances	81,399	83,472
Other liabilities	817,705	1,007,572
Total liabilities measured at fair value on a recurring basis	899,104	1,091,044
Measured at fair value on a recurring basis | Fixed maturities
Assets:
Fixed maturity securities - available-for-sale	37,436,408	38,511,863
Fixed maturity securities - trading	2,587,142	2,664,189
Measured at fair value on a recurring basis | Residential mortgage-backed securities
Assets:
Fixed maturity securities - available-for-sale	2,394,370	2,327,212
Fixed maturity securities - trading	265,547	259,694
Measured at fair value on a recurring basis | Commercial mortgage-backed securities
Assets:
Fixed maturity securities - available-for-sale	1,841,506	1,889,822
Fixed maturity securities - trading	146,633	146,804
Measured at fair value on a recurring basis | Other asset-backed securities
Assets:
Fixed maturity securities - available-for-sale	1,244,652	1,249,549
Fixed maturity securities - trading	129,714	138,097
Measured at fair value on a recurring basis | U.S. government-related securities
Assets:
Fixed maturity securities - available-for-sale	1,327,800	1,223,252
Fixed maturity securities - trading	37,575	27,234
Measured at fair value on a recurring basis | States, municipals, and political subdivisions
Assets:
Fixed maturity securities - available-for-sale	1,700,279	1,741,645
Fixed maturity securities - trading	318,142	326,925
Measured at fair value on a recurring basis | Other government-related securities
Assets:
Fixed maturity securities - available-for-sale	277,459	287,282
Fixed maturity securities - trading	40,368	63,925
Measured at fair value on a recurring basis | Corporate securities
Assets:
Fixed maturity securities - available-for-sale	28,559,773	29,702,010
Fixed maturity securities - trading	1,645,899	1,698,183
Measured at fair value on a recurring basis | Redeemable Preferred stock
Assets:
Fixed maturity securities - available-for-sale	90,569	91,091
Fixed maturity securities - trading	3,264	3,327
Measured at fair value on a recurring basis | Level 1
Assets:
Total fixed maturity securities	1,148,315	1,055,756
Equity securities	615,423	688,214
Other long-term investments	87,558	51,102
Short-term investments	327,834	482,461
Total investments	2,179,130	2,277,533
Cash	307,724	252,310
Other assets	34,463	28,771
Assets related to separate accounts
Variable annuity	13,549,068	13,956,071
Variable universal life	1,019,250	1,035,202
Total assets measured at fair value on a recurring basis	17,089,635	17,549,887
Liabilities:
Annuity account balances	0	0
Other liabilities	7,397	5,755
Total liabilities measured at fair value on a recurring basis	7,397	5,755
Measured at fair value on a recurring basis | Level 1 | Fixed maturities
Assets:
Fixed maturity securities - available-for-sale	1,113,367	1,031,246
Fixed maturity securities - trading	34,948	24,510
Measured at fair value on a recurring basis | Level 1 | Residential mortgage-backed securities
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 1 | Commercial mortgage-backed securities
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 1 | Other asset-backed securities
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 1 | U.S. government-related securities
Assets:
Fixed maturity securities - available-for-sale	1,041,123	958,775
Fixed maturity securities - trading	31,684	21,183
Measured at fair value on a recurring basis | Level 1 | States, municipals, and political subdivisions
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 1 | Other government-related securities
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 1 | Corporate securities
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 1 | Redeemable Preferred stock
Assets:
Fixed maturity securities - available-for-sale	72,244	72,471
Fixed maturity securities - trading	3,264	3,327
Measured at fair value on a recurring basis | Level 2
Assets:
Total fixed maturity securities	37,704,755	38,948,366
Equity securities	36	36
Other long-term investments	354,855	417,969
Short-term investments	113,947	132,749
Total investments	38,173,593	39,499,120
Cash	0	0
Other assets	0	0
Assets related to separate accounts
Variable annuity	0	0
Variable universal life	0	0
Total assets measured at fair value on a recurring basis	38,173,593	39,499,120
Liabilities:
Annuity account balances	0	0
Other liabilities	189,206	240,927
Total liabilities measured at fair value on a recurring basis	189,206	240,927
Measured at fair value on a recurring basis | Level 2 | Fixed maturities
Assets:
Fixed maturity securities - available-for-sale	35,192,843	36,349,351
Fixed maturity securities - trading	2,511,912	2,599,015
Measured at fair value on a recurring basis | Level 2 | Residential mortgage-backed securities
Assets:
Fixed maturity securities - available-for-sale	2,394,370	2,327,212
Fixed maturity securities - trading	265,547	259,694
Measured at fair value on a recurring basis | Level 2 | Commercial mortgage-backed securities
Assets:
Fixed maturity securities - available-for-sale	1,841,506	1,889,822
Fixed maturity securities - trading	146,633	146,804
Measured at fair value on a recurring basis | Level 2 | Other asset-backed securities
Assets:
Fixed maturity securities - available-for-sale	740,863	745,184
Fixed maturity securities - trading	94,756	102,875
Measured at fair value on a recurring basis | Level 2 | U.S. government-related securities
Assets:
Fixed maturity securities - available-for-sale	286,677	264,477
Fixed maturity securities - trading	5,891	6,051
Measured at fair value on a recurring basis | Level 2 | States, municipals, and political subdivisions
Assets:
Fixed maturity securities - available-for-sale	1,700,279	1,741,645
Fixed maturity securities - trading	318,142	326,925
Measured at fair value on a recurring basis | Level 2 | Other government-related securities
Assets:
Fixed maturity securities - available-for-sale	277,459	287,282
Fixed maturity securities - trading	40,368	63,925
Measured at fair value on a recurring basis | Level 2 | Corporate securities
Assets:
Fixed maturity securities - available-for-sale	27,933,364	29,075,109
Fixed maturity securities - trading	1,640,575	1,692,741
Measured at fair value on a recurring basis | Level 2 | Redeemable Preferred stock
Assets:
Fixed maturity securities - available-for-sale	18,325	18,620
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 3
Assets:
Total fixed maturity securities	1,170,480	1,171,930
Equity securities	66,061	66,110
Other long-term investments	144,352	136,004
Short-term investments	0	0
Total investments	1,380,893	1,374,044
Cash	0	0
Other assets	0	0
Assets related to separate accounts
Variable annuity	0	0
Variable universal life	0	0
Total assets measured at fair value on a recurring basis	1,380,893	1,374,044
Liabilities:
Annuity account balances	81,399	83,472
Other liabilities	621,102	760,890
Total liabilities measured at fair value on a recurring basis	702,501	844,362
Measured at fair value on a recurring basis | Level 3 | Fixed maturities
Assets:
Fixed maturity securities - available-for-sale	1,130,198	1,131,266
Fixed maturity securities - trading	40,282	40,664
Measured at fair value on a recurring basis | Level 3 | Residential mortgage-backed securities
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 3 | Commercial mortgage-backed securities
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 3 | Other asset-backed securities
Assets:
Fixed maturity securities - available-for-sale	503,789	504,365
Fixed maturity securities - trading	34,958	35,222
Measured at fair value on a recurring basis | Level 3 | U.S. government-related securities
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 3 | States, municipals, and political subdivisions
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 3 | Other government-related securities
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	0	0
Measured at fair value on a recurring basis | Level 3 | Corporate securities
Assets:
Fixed maturity securities - available-for-sale	626,409	626,901
Fixed maturity securities - trading	5,324	5,442
Measured at fair value on a recurring basis | Level 3 | Redeemable Preferred stock
Assets:
Fixed maturity securities - available-for-sale	0	0
Fixed maturity securities - trading	$ 0	$ 0

FAIR VALUE OF FINANCIAL INSTR58

FAIR VALUE OF FINANCIAL INSTRUMENTS - Additional Information (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)quoteprimary_sourceinput_method	Dec. 31, 2017USD ($)	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)
Assets and liabilities measured at fair value on a recurring basis
Number of sources of information considered | primary_source	1
Number of sources of information | input_method	3
Minimum percentage of the Company's fixed maturity securities priced by third party pricing services	92.40%
Number of broker quotes obtained per security | quote	1
Percentage of derivatives excluding embedded derivatives that were priced using exchange prices or independent broker quotations	100.00%
Financial instruments with book value approximating fair value	$ 65,700	$ 65,700
Level 3
Assets and liabilities measured at fair value on a recurring basis
Level 3 fair value	702,501	844,362	$ 673,489	$ 659,459
Financial instruments that are valued using broker quotes	49,500	50,400
Level 3 | Annuity account
Assets and liabilities measured at fair value on a recurring basis
Level 3 fair value	81,399	$ 83,472	$ 86,415	$ 87,616
Asset-backed securities | Level 2
Assets and liabilities measured at fair value on a recurring basis
Fair Value	5,500,000
Asset-backed securities | Level 3
Assets and liabilities measured at fair value on a recurring basis
Fair Value	$ 538,700
Other asset-backed securities
Assets and liabilities measured at fair value on a recurring basis
Percentage of underlying collateral of student-loan backed auction rate securities guaranteed by the Federal Family Education Loan Program (FFELP), minimum	97.00%	97.00%
Other asset-backed securities | Level 3
Assets and liabilities measured at fair value on a recurring basis
Fair Value	$ 503,672	$ 504,228
Percentage of underlying collateral of student-loan backed auction rate securities guaranteed by the Federal Family Education Loan Program (FFELP), minimum	97.00%
Financial instruments that are valued using broker quotes	$ 35,100	35,400
Other asset-backed securities | Level 3 | Available-for-sale securities
Assets and liabilities measured at fair value on a recurring basis
Fair Value	503,700
Other asset-backed securities | Level 3 | Trading securities
Assets and liabilities measured at fair value on a recurring basis
Fair Value	35,000
Corporate Bonds And Securities | Level 2
Assets and liabilities measured at fair value on a recurring basis
Fair Value	32,200,000
Corporate Bonds And Securities | Level 3
Assets and liabilities measured at fair value on a recurring basis
Fair Value	631,700
Equity securities
Assets and liabilities measured at fair value on a recurring basis
Fair Value	66,100
Federal Home Loan Bank (FHLB) stock	65,500
Equity securities | Level 3
Assets and liabilities measured at fair value on a recurring basis
Financial instruments that are valued using broker quotes	$ 400	400
Embedded derivative - GLWB | Minimum
Assets and liabilities measured at fair value on a recurring basis
Mortality (as a percent)	91.10%
Embedded derivative - GLWB | Maximum
Assets and liabilities measured at fair value on a recurring basis
Mortality (as a percent)	106.60%
Embedded derivative - FIA | Minimum
Assets and liabilities measured at fair value on a recurring basis
Mortality (as a percent)	46.00%
Embedded derivative - FIA | Maximum
Assets and liabilities measured at fair value on a recurring basis
Mortality (as a percent)	113.00%
Embedded derivative - IUL | Minimum
Assets and liabilities measured at fair value on a recurring basis
Mortality (as a percent)	34.00%
Embedded derivative - IUL | Maximum
Assets and liabilities measured at fair value on a recurring basis
Mortality (as a percent)	152.00%
Embedded derivative - Modified coinsurance agreements
Assets and liabilities measured at fair value on a recurring basis
Statutory policy liabilities (net of policy loans)	$ 2,400,000
Embedded derivative - Modified coinsurance agreements | Trading securities
Assets and liabilities measured at fair value on a recurring basis
Fair Value	134,100
Corporate securities | Level 3
Assets and liabilities measured at fair value on a recurring basis
Fair Value	617,724	617,770
Financial instruments that are valued using broker quotes	$ 14,000	$ 14,600

FAIR VALUE OF FINANCIAL INSTR59

FAIR VALUE OF FINANCIAL INSTRUMENTS - Valuation of Level 3 Financial Instruments (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Liabilities:
Fair Value	$ 817,705,000	$ 1,007,572,000
Embedded derivative - GLWB | Minimum
Unobservable input
Mortality (as a percent)	91.10%
Embedded derivative - GLWB | Maximum
Unobservable input
Mortality (as a percent)	106.60%
Embedded derivative - FIA | Minimum
Unobservable input
Mortality (as a percent)	46.00%
Embedded derivative - FIA | Maximum
Unobservable input
Mortality (as a percent)	113.00%
Embedded derivative - IUL | Minimum
Unobservable input
Mortality (as a percent)	34.00%
Embedded derivative - IUL | Maximum
Unobservable input
Mortality (as a percent)	152.00%
Equity securities
Assets:
Fair Value	$ 66,100,000
Level 3 | Other asset-backed securities
Assets:
Fair Value	503,672,000	504,228,000
Level 3 | Corporate securities
Assets:
Fair Value	617,724,000	617,770,000
Level 3 | Embedded derivative - GLWB
Liabilities:
Fair Value	55,468,000	111,760,000
Level 3 | Embedded derivative - FIA
Liabilities:
Fair Value	218,340,000	218,676,000
Level 3 | Embedded derivative - IUL
Liabilities:
Fair Value	77,350,000	80,212,000
Level 3 | Liquidation Technique | Other asset-backed securities | Minimum
Unobservable input
Liquidation value	90	90
Level 3 | Liquidation Technique | Other asset-backed securities | Maximum
Unobservable input
Liquidation value	97	97
Level 3 | Liquidation Technique | Other asset-backed securities | Weighted average
Unobservable input
Liquidation value	$ 94.92	$ 94.91
Level 3 | Discounted cash flow | Other asset-backed securities | Minimum
Unobservable input
Liquidity premium (as a percent)	0.07%	0.06%
Paydown rate (as a percent)	11.63%	11.31%
Level 3 | Discounted cash flow | Other asset-backed securities | Maximum
Unobservable input
Liquidity premium (as a percent)	1.09%	1.17%
Paydown rate (as a percent)	12.53%	11.97%
Level 3 | Discounted cash flow | Other asset-backed securities | Weighted average
Unobservable input
Liquidity premium (as a percent)	0.73%	0.75%
Paydown rate (as a percent)	12.16%	11.54%
Level 3 | Discounted cash flow | Corporate securities | Minimum
Unobservable input
Spread over treasury (as a percent)	0.96%	0.81%
Level 3 | Discounted cash flow | Corporate securities | Maximum
Unobservable input
Spread over treasury (as a percent)	4.35%	3.95%
Level 3 | Discounted cash flow | Corporate securities | Weighted average
Unobservable input
Spread over treasury (as a percent)	1.61%	1.06%
Level 3 | Actuarial cash flow model | Embedded derivative - GLWB
Unobservable input
Utilization (as a percent)	99.00%	99.00%
Policies that have a one-time over-utilization rate of a specified amount (as a percent)	10.00%	10.00%
Specified level of one-time over-utilization (as a percent)	400.00%	400.00%
Level 3 | Actuarial cash flow model | Embedded derivative - GLWB | Minimum
Unobservable input
Mortality (as a percent)	91.10%	91.10%
Lapse rate (as a percent)	0.30%	1.00%
Nonperformance risk (as a percent)	0.14%	0.11%
Level 3 | Actuarial cash flow model | Embedded derivative - GLWB | Maximum
Unobservable input
Mortality (as a percent)	106.60%	106.60%
Lapse rate (as a percent)	15.00%	30.00%
Nonperformance risk (as a percent)	0.95%	0.79%
Level 3 | Actuarial cash flow model | Embedded derivative - FIA
Unobservable input
Expenses per Policy	$ 146	$ 146
Withdrawal rate prior to age 70 (as a percent)	1.50%	1.50%
Withdrawal rate for ages 70 or more (as a percent)	100.00%	100.00%
Level 3 | Actuarial cash flow model | Embedded derivative - FIA | Minimum
Unobservable input
Lapse rate (as a percent)	1.00%	1.00%
Nonperformance risk (as a percent)	0.14%	0.11%
Level 3 | Actuarial cash flow model | Embedded derivative - FIA | Maximum
Unobservable input
Lapse rate (as a percent)	30.00%	30.00%
Nonperformance risk (as a percent)	0.95%	0.79%
Level 3 | Actuarial cash flow model | Embedded derivative - IUL | Minimum
Unobservable input
Mortality (as a percent)	34.00%	34.00%
Lapse rate (as a percent)	0.50%	0.50%
Nonperformance risk (as a percent)	0.14%	0.11%
Level 3 | Actuarial cash flow model | Embedded derivative - IUL | Maximum
Unobservable input
Mortality (as a percent)	152.00%	152.00%
Lapse rate (as a percent)	10.00%	10.00%
Nonperformance risk (as a percent)	0.95%	0.79%

FAIR VALUE OF FINANCIAL INSTR60

FAIR VALUE OF FINANCIAL INSTRUMENTS - Reconciliation of Beginning and Ending Balances for Fair Value Measurements (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Transfers
Transfers into Level 3	$ 0	$ 0
Securities transferred from level 3 to level 2	0	9,300,000
Transfers from Level 2 to Level 1	0	0
Transfers from Level 1	0	0
Level 3
Assets:
Beginning Balance	1,374,044,000	1,510,043,000
Total Realized and Unrealized Gains Included in Earnings	9,058,000	14,569,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	1,913,000	11,303,000
Total Realized and Unrealized Losses Included in Earnings	(687,000)	(5,174,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(13,735,000)	(1,113,000)
Purchases	35,000,000	37,259,000
Sales	(24,045,000)	(60,210,000)
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	(9,287,000)
Other	(655,000)	319,000
Ending Balance	1,380,893,000	1,497,709,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	8,371,000	12,026,000
Liabilities:
Beginning Balance	844,362,000	659,459,000
Total Realized and Unrealized Gains Included in Earnings	161,318,000	44,263,000
Total Realized and Unrealized Gains Included In Other Comprehensive Income	0	0
Total Realized and Unrealized Losses Included in Earnings	(22,324,000)	(60,381,000)
Total Realized and Unrealized Losses Included In Other Comprehensive Income	0	0
Purchases	0	0
Sales	0	0
Issuances	441,000	180,000
Settlements	3,308,000	2,268,000
Transfers in/out of Level 3	0	0
Other	0	0
Ending Balance	702,501,000	673,489,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	139,788,000	(15,231,000)
Level 3 | Annuity account
Liabilities:
Beginning Balance	83,472,000	87,616,000
Total Realized and Unrealized Gains Included in Earnings	0	0
Total Realized and Unrealized Gains Included In Other Comprehensive Income	0	0
Total Realized and Unrealized Losses Included in Earnings	(794,000)	(887,000)
Total Realized and Unrealized Losses Included In Other Comprehensive Income	0	0
Purchases	0	0
Sales	0	0
Issuances	441,000	180,000
Settlements	3,308,000	2,268,000
Transfers in/out of Level 3	0	0
Other	0	0
Ending Balance	81,399,000	86,415,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	0	0
Level 3 | Other liabilities
Liabilities:
Beginning Balance	760,890,000	571,843,000
Total Realized and Unrealized Gains Included in Earnings	161,318,000	44,263,000
Total Realized and Unrealized Gains Included In Other Comprehensive Income	0	0
Total Realized and Unrealized Losses Included in Earnings	(21,530,000)	(59,494,000)
Total Realized and Unrealized Losses Included In Other Comprehensive Income	0	0
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	0
Other	0	0
Ending Balance	621,102,000	587,074,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	139,788,000	(15,231,000)
Level 3 | Total investments
Assets:
Beginning Balance	1,374,044,000	1,510,043,000
Total Realized and Unrealized Gains Included in Earnings	9,058,000	14,569,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	1,913,000	11,303,000
Total Realized and Unrealized Losses Included in Earnings	(687,000)	(5,174,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(13,735,000)	(1,113,000)
Purchases	35,000,000	37,259,000
Sales	(24,045,000)	(60,210,000)
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	(9,287,000)
Other	(655,000)	319,000
Ending Balance	1,380,893,000	1,497,709,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	8,371,000	12,026,000
Level 3 | Fixed maturities
Assets:
Beginning Balance	1,171,930,000	1,316,708,000
Total Realized and Unrealized Gains Included in Earnings	194,000	3,508,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	1,913,000	11,301,000
Total Realized and Unrealized Losses Included in Earnings	(122,000)	(586,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(13,735,000)	(1,113,000)
Purchases	35,000,000	37,259,000
Sales	(24,045,000)	(60,210,000)
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	(9,290,000)
Other	(655,000)	320,000
Ending Balance	1,170,480,000	1,297,897,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	72,000	2,922,000
Level 3 | Equity securities
Assets:
Beginning Balance	66,110,000	69,010,000
Total Realized and Unrealized Gains Included in Earnings	0	0
Total Realized and Unrealized Gains Included in Other Comprehensive Income	0	2,000
Total Realized and Unrealized Losses Included in Earnings	(49,000)	(2,630,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	0	0
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	3,000
Other	0	(1,000)
Ending Balance	66,061,000	66,384,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	(49,000)	1,000
Level 3 | Other long-term investments
Assets:
Beginning Balance	136,004,000	124,325,000
Total Realized and Unrealized Gains Included in Earnings	8,864,000	11,061,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	0	0
Total Realized and Unrealized Losses Included in Earnings	(516,000)	(1,958,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	0	0
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	0
Other	0	0
Ending Balance	144,352,000	133,428,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	8,348,000	9,103,000
Level 3 | Available-for-sale securities | Fixed maturities
Assets:
Beginning Balance	1,131,266,000	1,226,653,000
Total Realized and Unrealized Gains Included in Earnings	0	0
Total Realized and Unrealized Gains Included in Other Comprehensive Income	1,913,000	11,301,000
Total Realized and Unrealized Losses Included in Earnings	0	0
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(13,735,000)	(1,113,000)
Purchases	35,000,000	37,259,000
Sales	(23,649,000)	(40,902,000)
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	(9,290,000)
Other	(597,000)	(267,000)
Ending Balance	1,130,198,000	1,223,641,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	0	0
Level 3 | Available-for-sale securities | Residential mortgage-backed securities
Assets:
Beginning Balance	0	3,000
Total Realized and Unrealized Gains Included in Earnings	0	0
Total Realized and Unrealized Gains Included in Other Comprehensive Income	0	0
Total Realized and Unrealized Losses Included in Earnings	0	0
Total Realized and Unrealized Losses Included in Other Comprehensive Income	0	0
Purchases	0	0
Sales	0	(3,000)
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	0
Other	0	0
Ending Balance	0	0
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	0	0
Level 3 | Available-for-sale securities | Commercial mortgage-backed securities
Assets:
Beginning Balance	0	0
Total Realized and Unrealized Gains Included in Earnings	0	0
Total Realized and Unrealized Gains Included in Other Comprehensive Income	0	0
Total Realized and Unrealized Losses Included in Earnings	0	0
Total Realized and Unrealized Losses Included in Other Comprehensive Income	0	0
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	0
Other	0	0
Ending Balance	0	0
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	0	0
Level 3 | Available-for-sale securities | Other asset-backed securities
Assets:
Beginning Balance	504,365,000	562,604,000
Total Realized and Unrealized Gains Included in Earnings	0	0
Total Realized and Unrealized Gains Included in Other Comprehensive Income	514,000	3,530,000
Total Realized and Unrealized Losses Included in Earnings	0	0
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(1,634,000)	(831,000)
Purchases	0	0
Sales	(14,000)	(2,015,000)
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	(6,643,000)
Other	558,000	291,000
Ending Balance	503,789,000	556,936,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	0	0
Level 3 | Available-for-sale securities | Corporate securities
Assets:
Beginning Balance	626,901,000	664,046,000
Total Realized and Unrealized Gains Included in Earnings	0	0
Total Realized and Unrealized Gains Included in Other Comprehensive Income	1,399,000	7,771,000
Total Realized and Unrealized Losses Included in Earnings	0	0
Total Realized and Unrealized Losses Included in Other Comprehensive Income	(12,101,000)	(282,000)
Purchases	35,000,000	37,259,000
Sales	(23,635,000)	(38,884,000)
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	(2,647,000)
Other	(1,155,000)	(558,000)
Ending Balance	626,409,000	666,705,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	0	0
Level 3 | Trading securities | Fixed maturities
Assets:
Beginning Balance	40,664,000	90,055,000
Total Realized and Unrealized Gains Included in Earnings	194,000	3,508,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	0	0
Total Realized and Unrealized Losses Included in Earnings	(122,000)	(586,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	0	0
Purchases	0	0
Sales	(396,000)	(19,308,000)
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	0
Other	(58,000)	587,000
Ending Balance	40,282,000	74,256,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	72,000	2,922,000
Level 3 | Trading securities | Other asset-backed securities
Assets:
Beginning Balance	35,222,000	84,563,000
Total Realized and Unrealized Gains Included in Earnings	194,000	3,474,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	0	0
Total Realized and Unrealized Losses Included in Earnings	(28,000)	(586,000)
Total Realized and Unrealized Losses Included in Other Comprehensive Income	0	0
Purchases	0	0
Sales	(396,000)	(19,308,000)
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	0
Other	(34,000)	609,000
Ending Balance	34,958,000	68,752,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	166,000	2,888,000
Level 3 | Trading securities | Corporate securities
Assets:
Beginning Balance	5,442,000	5,492,000
Total Realized and Unrealized Gains Included in Earnings	0	34,000
Total Realized and Unrealized Gains Included in Other Comprehensive Income	0	0
Total Realized and Unrealized Losses Included in Earnings	(94,000)	0
Total Realized and Unrealized Losses Included in Other Comprehensive Income	0	0
Purchases	0	0
Sales	0	0
Issuances	0	0
Settlements	0	0
Transfers in/out of Level 3	0	0
Other	(24,000)	(22,000)
Ending Balance	5,324,000	5,504,000
Total Gains (losses) included in Earnings related to Instruments still held at the Reporting Date	$ (94,000)	$ 34,000

FAIR VALUE OF FINANCIAL INSTR61

FAIR VALUE OF FINANCIAL INSTRUMENTS - Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets:
Mortgage loans on real estate	$ 6,846,633	$ 6,817,723
Policy loans	1,594,642	1,615,615
Fixed maturities, held-to-maturity	2,699,826	2,718,904
Liabilities:
Stable value product account balances	4,699,614	4,698,371
Annuity account balances	11,060,885	10,921,190
Other policyholders’ funds	1,114,823	1,267,198
Debt:
Subordinated debt securities	495,324	495,289
Non-recourse funding obligations	2,728,689	2,747,477
Capital lease obligation	1,600
Golden Gate V
Debt:
Non-recourse funding obligations	695,836	681,285
Carrying Amounts
Assets:
Fixed maturities, held-to-maturity	2,699,826	2,718,904
Level 3 | Carrying Amounts
Assets:
Mortgage loans on real estate	6,846,633	6,817,723
Policy loans	1,594,642	1,615,615
Liabilities:
Stable value product account balances	4,699,614	4,698,371
Annuity account balances	220,307	220,498
Other policyholders’ funds	135,202	133,508
Debt:
Bank borrowings	325,000	0
Non-recourse funding obligations	2,728,689	2,747,477
Level 3 | Carrying Amounts | Golden Gate V
Debt:
Non-recourse funding obligations	2,600,000	2,700,000
Level 3 | Fair Values
Assets:
Mortgage loans on real estate	6,646,782	6,740,177
Policy loans	1,594,642	1,615,615
Fixed maturities, held-to-maturity	2,674,129	2,776,327
Liabilities:
Stable value product account balances	4,658,178	4,698,868
Annuity account balances	220,307	220,498
Other policyholders’ funds	135,921	134,253
Debt:
Bank borrowings	325,000	0
Non-recourse funding obligations	2,706,594	2,804,983
Level 3 | Fair Values | Golden Gate V
Debt:
Non-recourse funding obligations	2,700,000	2,800,000
Level 2 | Carrying Amounts
Debt:
Senior Notes	769,776	943,370
Subordinated debt securities	495,324	495,289
Level 2 | Fair Values
Debt:
Senior Notes	751,951	933,926
Subordinated debt securities	$ 486,595	$ 501,215

DERIVATIVE FINANCIAL INSTRUME62

DERIVATIVE FINANCIAL INSTRUMENTS - Realized Investment Gains (Losses) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	$ 78,059	$ (69,878)
Derivatives not designated as hedging instruments
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	78,059	(69,878)
Derivatives not designated as hedging instruments | Embedded derivative - Modco reinsurance treaties
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	82,658	(17,865)
Derivatives not designated as hedging instruments | Other derivatives
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(40)	3
Derivatives not designated as hedging instruments | VA
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(19,829)	(50,604)
Derivatives not designated as hedging instruments | VA | Interest rate futures
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(16,892)	3,448
Derivatives not designated as hedging instruments | VA | Equity futures
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(6,428)	(30,817)
Derivatives not designated as hedging instruments | VA | Currency futures
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(7,583)	(6,256)
Derivatives not designated as hedging instruments | VA | Equity options
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	12,016	(40,185)
Derivatives not designated as hedging instruments | VA | Interest rate swaptions
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(14)	(1,469)
Derivatives not designated as hedging instruments | VA | Interest rate swaps
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(63,710)	(8,957)
Derivatives not designated as hedging instruments | VA | Total return swaps
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	6,490	0
Derivatives not designated as hedging instruments | VA | Embedded derivative - GLWB
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	56,292	33,632
Derivatives not designated as hedging instruments | FIA
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	6,500	(1,414)
Derivatives not designated as hedging instruments | FIA | Equity futures
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(161)	297
Derivatives not designated as hedging instruments | FIA | Equity options
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(4,669)	10,700
Derivatives not designated as hedging instruments | FIA | Embedded derivative - FIA
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	11,330	(12,411)
Derivatives not designated as hedging instruments | IUL
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	8,770	2
Derivatives not designated as hedging instruments | IUL | Equity futures
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	136	(799)
Derivatives not designated as hedging instruments | IUL | Equity options
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	(1,250)	2,891
Derivatives not designated as hedging instruments | IUL | Embedded derivative - IUL
Notional amount and fair value of the entity's derivative financial instruments
Total realized gains (losses) - derivatives	$ 9,884	$ (2,090)

DERIVATIVE FINANCIAL INSTRUME63

DERIVATIVE FINANCIAL INSTRUMENTS - Gain (Loss) on Derivatives in Cash Flow Hedging Relationship (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Gain (Loss) on Derivatives in Cash Flow Hedging Relationship
Amount of gains (losses) reclassified from accumulated other comprehensive income (loss) into income (loss) next 12 months	$ 400
Cash flow hedges
Gain (Loss) on Derivatives in Cash Flow Hedging Relationship
Amount of Gains (Losses) Deferred in Accumulated Other Comprehensive Income (Loss) on Derivatives	615	$ (1,034)
Amount and Location of Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss)	(113)	(205)
Amount and Location of (Losses) Recognized in Income (Loss) on Derivatives	0	0
Cash flow hedges | Foreign currency swaps
Gain (Loss) on Derivatives in Cash Flow Hedging Relationship
Amount of Gains (Losses) Deferred in Accumulated Other Comprehensive Income (Loss) on Derivatives	615	(1,034)
Amount and Location of Gains (Losses) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income (Loss)	(113)	(205)
Amount and Location of (Losses) Recognized in Income (Loss) on Derivatives	$ 0	$ 0

DERIVATIVE FINANCIAL INSTRUME64

DERIVATIVE FINANCIAL INSTRUMENTS - Nature and Accounting Treatment of Derivative Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Derivative [Line Items]
Other long-term investments, Fair Value	$ 586,765	$ 605,075
Embedded derivative - Modco reinsurance treaties
Derivative [Line Items]
Other long-term investments, Fair Value	497	1,009
Embedded derivative - GLWB
Derivative [Line Items]
Other long-term investments, Fair Value	143,855	134,995
Derivatives designated as hedging instruments | Cash flow hedges | Foreign currency swaps
Derivative [Line Items]
Other long-term investments, Notional Amount	117,178	117,178
Other long-term investments, Fair Value	12,131	6,016
Derivatives not designated as hedging instruments
Derivative [Line Items]
Other long-term investments, Notional Amount	13,153,335	12,331,534
Other long-term investments, Fair Value	586,765	605,075
Other liabilities, Notional Amount	14,734,958	13,986,996
Other liabilities, Fair Value	817,705	1,007,572
Derivatives not designated as hedging instruments | Interest rate swaps
Derivative [Line Items]
Other long-term investments, Notional Amount	1,065,000	1,265,000
Other long-term investments, Fair Value	25,943	55,411
Other liabilities, Notional Amount	997,500	597,500
Other liabilities, Fair Value	12,157	2,960
Derivatives not designated as hedging instruments | Total return swaps
Derivative [Line Items]
Other long-term investments, Notional Amount	448,872	190,938
Other long-term investments, Fair Value	18,678	135
Other liabilities, Notional Amount	0	243,388
Other liabilities, Fair Value	0	318
Derivatives not designated as hedging instruments | Embedded derivative - Modco reinsurance treaties
Derivative [Line Items]
Other long-term investments, Notional Amount	64,798	64,472
Other long-term investments, Fair Value	497	1,009
Other liabilities, Notional Amount	2,375,807	2,390,539
Other liabilities, Fair Value	126,090	215,247
Derivatives not designated as hedging instruments | Embedded derivative - GLWB
Derivative [Line Items]
Other long-term investments, Notional Amount	5,264,710	4,897,069
Other long-term investments, Fair Value	143,855	134,995
Other liabilities, Notional Amount	4,378,592	4,718,311
Other liabilities, Fair Value	199,322	246,755
Derivatives not designated as hedging instruments | Embedded derivative - FIA
Derivative [Line Items]
Other liabilities, Notional Amount	2,109,420	1,951,650
Other liabilities, Fair Value	218,340	218,676
Derivatives not designated as hedging instruments | Embedded derivative - IUL
Derivative [Line Items]
Other liabilities, Notional Amount	186,173	168,349
Other liabilities, Fair Value	77,350	80,212
Derivatives not designated as hedging instruments | Interest rate futures
Derivative [Line Items]
Other long-term investments, Notional Amount	375,718	1,071,870
Other long-term investments, Fair Value	8,059	3,178
Other liabilities, Notional Amount	872,564	230,404
Other liabilities, Fair Value	4,630	917
Derivatives not designated as hedging instruments | Equity futures
Derivative [Line Items]
Other long-term investments, Notional Amount	272,807	62,266
Other long-term investments, Fair Value	11,218	154
Other liabilities, Notional Amount	95,918	318,795
Other liabilities, Fair Value	1,288	2,593
Derivatives not designated as hedging instruments | Currency futures
Derivative [Line Items]
Other long-term investments, Notional Amount	150,801	1,117
Other long-term investments, Fair Value	1,127	2
Other liabilities, Notional Amount	95,062	255,248
Other liabilities, Fair Value	971	2,087
Derivatives not designated as hedging instruments | Equity options
Derivative [Line Items]
Other long-term investments, Notional Amount	5,168,294	4,436,467
Other long-term investments, Fair Value	365,097	403,961
Other liabilities, Notional Amount	3,623,922	3,112,812
Other liabilities, Fair Value	177,557	237,807
Derivatives not designated as hedging instruments | Interest rate swaptions
Derivative [Line Items]
Other long-term investments, Notional Amount	225,000	225,000
Other long-term investments, Fair Value	0	14
Derivatives not designated as hedging instruments | Other
Derivative [Line Items]
Other long-term investments, Notional Amount	157	157
Other long-term investments, Fair Value	$ 160	$ 200

OFFSETTING OF ASSETS AND LIAB65

OFFSETTING OF ASSETS AND LIABILITIES - Schedule of Derivative Instruments by Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Offsetting of Assets
Gross Amounts of Recognized Assets, Derivatives not subject to a master netting arrangement	$ 586,765	$ 605,075
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	586,765	605,075
Derivative Asset, Not Offset, Policy Election Deduction	194,876	242,105
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	126,320	108,830
Net Amount	265,569	254,140
Free-Standing derivatives
Offsetting of Assets
Gross Amounts of Recognized Assets, Derivatives	442,253	468,871
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	442,253	468,871
Derivative Asset, Not Subject to Master Netting Arrangement Deduction	194,876	242,105
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	126,320	108,830
Net Amount	121,057	117,936
Total derivatives, subject to a master netting arrangement or similar arrangement
Offsetting of Assets
Gross Amounts of Recognized Assets, Derivatives	442,253	468,871
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	442,253	468,871
Derivative Asset, Not Subject to Master Netting Arrangement Deduction	194,876	242,105
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	126,320	108,830
Net Amount	121,057	117,936
Embedded derivative - Modco reinsurance treaties
Offsetting of Assets
Gross Amounts of Recognized Assets, Derivatives not subject to a master netting arrangement	497	1,009
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	497	1,009
Derivative Asset, Not Offset, Policy Election Deduction	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	0	0
Net Amount	497	1,009
Embedded derivative - GLWB
Offsetting of Assets
Gross Amounts of Recognized Assets, Derivatives not subject to a master netting arrangement	143,855	134,995
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	143,855	134,995
Derivative Asset, Not Offset, Policy Election Deduction	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	0	0
Net Amount	143,855	134,995
Other
Offsetting of Assets
Gross Amounts of Recognized Assets, Derivatives not subject to a master netting arrangement	160	200
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	160	200
Derivative Asset, Not Offset, Policy Election Deduction	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	0	0
Net Amount	160	200
Total derivatives, not subject to a master netting arrangement or similar arrangement
Offsetting of Assets
Gross Amounts of Recognized Assets, Derivatives not subject to a master netting arrangement	144,512	136,204
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Assets Presented in the Statement of Financial Position	144,512	136,204
Derivative Asset, Not Offset, Policy Election Deduction	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	0	0
Net Amount	$ 144,512	$ 136,204

OFFSETTING OF ASSETS AND LIAB66

OFFSETTING OF ASSETS AND LIABILITIES - Schedule of Derivative Instruments by Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Offsetting of Liabilities
Gross Amounts of Recognized Liabilities, Not subject to a master netting arrangement or similar arrangement	$ 817,705	$ 1,007,572
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	817,705	1,007,572
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	194,876	242,105
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	1,727	4,577
Net Amount	621,102	760,890
Repurchase agreements
Gross Amounts of Recognized Liabilities	665,000	885,000
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	665,000	885,000
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	0	0
Net Amount	665,000	885,000
Total Liabilities
Gross Amounts of Recognized Liabilities	1,482,705	1,892,572
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	1,482,705	1,892,572
Gross Amounts Not Offset in the Statement of Financial Position, Financial Instruments	194,876	242,105
Gross Amounts Not Offset in the Statement of Financial Position, Cash Collateral Paid	1,727	4,577
Net Amount	1,286,102	1,645,890
Free-Standing derivatives
Offsetting of Liabilities
Gross Amounts of Recognized Liabilities, Subject to a master netting arrangement or similar agreement	196,603	246,682
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	196,603	246,682
Derivative Liability, Not Offset, Policy Election Deduction	194,876	242,105
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	1,727	4,577
Net Amount	0	0
Total derivatives, subject to a master netting arrangement or similar arrangement
Offsetting of Liabilities
Gross Amounts of Recognized Liabilities, Subject to a master netting arrangement or similar agreement	196,603	246,682
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	196,603	246,682
Derivative Liability, Not Offset, Policy Election Deduction	194,876	242,105
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	1,727	4,577
Net Amount	0	0
Embedded derivative - Modco reinsurance treaties
Offsetting of Liabilities
Gross Amounts of Recognized Liabilities, Not subject to a master netting arrangement or similar arrangement	126,090	215,247
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	126,090	215,247
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	0	0
Net Amount	126,090	215,247
Embedded derivative - GLWB
Offsetting of Liabilities
Gross Amounts of Recognized Liabilities, Not subject to a master netting arrangement or similar arrangement	199,322	246,755
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	199,322	246,755
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	0	0
Net Amount	199,322	246,755
Embedded derivative - FIA
Offsetting of Liabilities
Gross Amounts of Recognized Liabilities, Not subject to a master netting arrangement or similar arrangement	218,340	218,676
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	218,340	218,676
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	0	0
Net Amount	218,340	218,676
Embedded derivative - IUL
Offsetting of Liabilities
Gross Amounts of Recognized Liabilities, Not subject to a master netting arrangement or similar arrangement	77,350	80,212
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	77,350	80,212
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	0	0
Net Amount	77,350	80,212
Total derivatives, not subject to a master netting arrangement or similar arrangement
Offsetting of Liabilities
Gross Amounts of Recognized Liabilities, Not subject to a master netting arrangement or similar arrangement	621,102	760,890
Gross Amounts Offset in the Statement of Financial Position	0	0
Net Amounts of Liabilities Presented in the Statement of Financial Position	621,102	760,890
Derivative Liability, Not Subject to Master Netting Arrangement Deduction	0	0
Gross Amounts Not Offset in the Statement of Financial Position, Cash/Securities Received as Collateral	0	0
Net Amount	$ 621,102	$ 760,890

MORTGAGE LOANS - Narrative (Det

MORTGAGE LOANS - Narrative (Details)	3 Months Ended
	Mar. 31, 2018USD ($)restructuringcategoryloan	Mar. 31, 2017USD ($)	Dec. 31, 2017USD ($)
Mortgage loans
Mortgage loans holdings	$ 6,846,633,000		$ 6,817,723,000
Mortgage loan call option period	12 years
Amount that would become due in remainder of 2018, if loans are called at their next call dates	$ 143,600,000
Amount that would become due in 2019 through 2023, if loans are called at their next call dates	873,100,000
Amount that would become due in 2024 through 2028, if loans are called at their next call dates	105,000,000
Amount that would become due after 2028, if loans are called at their next call dates	2,000,000
Loans not subject to a pooling and servicing agreement which are either nonperforming or restructured	$ 0
Number of troubled debt restructurings | restructuring	0
Number of nonperforming loans which have been restructured | loan	0
Loans subject to pooling and servicing agreement, which are either nonperforming or restructured | loan	0
Commercial mortgage loans
Mortgage loans
Mortgage loans having participation feature	$ 672,100,000		669,300,000
Income recognized on participating mortgage loans	7,300,000	$ 6,800,000
Loans not subject to a pooling and servicing agreement which are either nonperforming or restructured	$ 0
Number of loan categories | category	2
Loans not subject to a pooling and servicing agreement which re either nonperforming or restructed	$ 0
Allowance for mortgage loan credit losses	$ 0		$ 0
Past due period at which to cease carrying accrued interest on delinquent loans	90 days
Number of days accrued interest on impaired loans (less than)	90 days
Past due period at which to initiate foreclosure proceedings (more than)	90 days
Commercial mortgage loans | Maximum
Mortgage loans
Loan-to-value ratio with participating interest (as a percent)	85.00%

MORTGAGE LOANS - Delinquent Loa

MORTGAGE LOANS - Delinquent Loans (Details) - Commercial mortgage loans $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)loan	Dec. 31, 2017USD ($)loan
Delinquent loans
Commercial mortgage loans | $	$ 814	$ 1,817
Number of delinquent commercial mortgage loans | loan	1	2
30 to 59 Days Delinquent
Delinquent loans
Commercial mortgage loans | $	$ 814	$ 1,817
Number of delinquent commercial mortgage loans | loan	1	2
60 to 89 Days Delinquent
Delinquent loans
Commercial mortgage loans | $	$ 0	$ 0
Number of delinquent commercial mortgage loans | loan	0	0
Greater than 90 Days Delinquent
Delinquent loans
Commercial mortgage loans | $	$ 0	$ 0
Number of delinquent commercial mortgage loans | loan	0	0

MORTGAGE LOANS - Troubled Debt

MORTGAGE LOANS - Troubled Debt Restructuring (Details) - Commercial mortgage loans $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018USD ($)contract	Dec. 31, 2017USD ($)contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | contract	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 418
Post-Modification Outstanding Recorded Investment	$ 0	$ 418

GOODWILL (Details)

GOODWILL (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 793,470,000	$ 793,470,000
Change in goodwill	$ 0

DEBT AND OTHER OBLIGATIONS - Su

DEBT AND OTHER OBLIGATIONS - Summary of Debt and Subordinated Debt Securities (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Outstanding Principal	$ 948,107,000	$ 784,610,000
Carrying Amounts, Debt	1,096,368,000	945,052,000
Carrying Amounts, Subordinated debt securities	495,324,000	495,289,000
Revolving Line of Credit
Debt Instrument [Line Items]
Outstanding Principal	325,000,000	0
Carrying Amounts, Debt	325,000,000	0
Capital lease obligation
Debt Instrument [Line Items]
Outstanding Principal	1,591,000	1,682,000
Carrying Amounts, Debt	1,591,000	1,682,000
Subordinated debt securities
Debt Instrument [Line Items]
Outstanding Principal	500,000,000	500,000,000
Carrying Amounts, Subordinated debt securities	495,324,000	495,289,000
6.40% Senior Notes (2007), due 2018
Debt Instrument [Line Items]
Outstanding Principal	0	150,000,000
Carrying Amounts, Debt	$ 0	150,518,000
Stated interest rate (as a percent)	6.40%
7.375% Senior Notes (2009), due 2019
Debt Instrument [Line Items]
Outstanding Principal	$ 400,000,000	400,000,000
Carrying Amounts, Debt	$ 431,015,000	435,806,000
Stated interest rate (as a percent)	7.375%
8.45% Senior Notes (2009), due 2039
Debt Instrument [Line Items]
Outstanding Principal	$ 221,516,000	232,928,000
Carrying Amounts, Debt	338,762,000	357,046,000
Debt repurchased and subsequently extinguished	17,500,000
Par value of extinguished debt	$ 11,400,000
Stated interest rate (as a percent)	8.45%
Pre-tax gain (loss) on extinguishment of debt	$ 500,000
5.35% Subordinated Debentures (2017), due 2052
Debt Instrument [Line Items]
Stated interest rate (as a percent)	5.35%
5.35% Subordinated Debentures (2017), due 2052 | Subordinated debt securities
Debt Instrument [Line Items]
Outstanding Principal	$ 500,000,000	500,000,000
Carrying Amounts, Subordinated debt securities	495,324,000	495,289,000
Deferred issuance expenses		$ 4,800,000
6.00% suordinated debentures due 2042
Debt Instrument [Line Items]
Stated interest rate (as a percent)		6.00%
6.00% suordinated debentures due 2042 | Subordinated debt securities
Debt Instrument [Line Items]
Debt repurchased and subsequently extinguished		$ 150,000,000
6.25% subordinated debentures due 2042
Debt Instrument [Line Items]
Stated interest rate (as a percent)		6.25%
6.25% subordinated debentures due 2042 | Subordinated debt securities
Debt Instrument [Line Items]
Debt repurchased and subsequently extinguished		$ 287,500,000
Credit Facility
Debt Instrument [Line Items]
Line of credit, maximum borrowing capacity	1,000,000,000
Line of credit, maximum borrowing capacity to be granted upon entity's request	$ 1,250,000,000
Facility fee percentage	0.125%
Line of credit, amount outstanding	$ 325,000,000
Credit Facility | Federal Funds Rate
Debt Instrument [Line Items]
Interest rate added to the base rate (as a percent)	0.50%
Credit Facility | One-Month LIBOR
Debt Instrument [Line Items]
Interest rate added to the base rate (as a percent)	1.00%
Credit Facility | LIBOR
Debt Instrument [Line Items]
Interest rate added to the base rate (as a percent)	1.00%

DEBT AND OTHER OBLIGATIONS - No

DEBT AND OTHER OBLIGATIONS - Non-Recourse Funding Obligations (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Outstanding Principal	$ 2,675,691	$ 2,693,691
Carrying Value	2,728,689	2,747,477
Golden Gate Captive Insurance Company
Debt Instrument [Line Items]
Outstanding Principal	1,981,000	2,014,000
Carrying Value	$ 1,981,000	$ 2,014,000
Year-to-Date Weighted-Avg Interest Rate	4.75%	4.75%
Golden Gate II Captive Insurance Company
Debt Instrument [Line Items]
Outstanding Principal	$ 58,600	$ 58,600
Carrying Value	$ 49,464	$ 49,787
Year-to-Date Weighted-Avg Interest Rate	4.29%	3.88%
Golden Gate V Vermont Captive Insurance Company
Debt Instrument [Line Items]
Outstanding Principal	$ 635,000	$ 620,000
Carrying Value	$ 695,836	$ 681,285
Year-to-Date Weighted-Avg Interest Rate	5.12%	5.12%
MONY Life Insurance Company
Debt Instrument [Line Items]
Outstanding Principal	$ 1,091	$ 1,091
Carrying Value	$ 2,389	$ 2,405
Year-to-Date Weighted-Avg Interest Rate	6.19%	6.19%

DEBT AND OTHER OBLIGATIONS - Re

DEBT AND OTHER OBLIGATIONS - Repurchase Program Borrowings (Details) - Repurchase Program Borrowings - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Fair value of securities pledged under the repurchase program	$ 753.6	$ 1,006.6
Secured financing liabilities	$ 665	$ 885
Average borrowing rate (as a percent)	1.73%	1.42%
Maximum balance outstanding	$ 885	$ 988.5
Average daily balance	$ 808	$ 624.7
Average daily balance, average borrowing rate (as a percent)	1.49%	1.01%
Maximum
Debt Instrument [Line Items]
Term of financing agreement	90 days

DEBT AND OTHER OBLIGATIONS - Am

DEBT AND OTHER OBLIGATIONS - Amount of Collateral Pledged for Repurchase Agreements and Securities Lending Transactions, Grouped by Asset Class (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Initial collateral (as a percent)	102.00%
Securities lending transactions	$ 107,028	$ 125,271
Fair value of collateral	113,900
Obligation to return securities	113,900
Repurchase agreements and repurchase-to-maturity transactions	753,611	1,006,607
Total securities	860,639	1,131,878
Overnight and Continuous
Debt Instrument [Line Items]
Securities lending transactions	107,028	125,271
Repurchase agreements and repurchase-to-maturity transactions	753,611	1,006,607
Total securities	860,639	1,131,878
Up to 30 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Repurchase agreements and repurchase-to-maturity transactions	0	0
Total securities	0	0
30-90 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Repurchase agreements and repurchase-to-maturity transactions	0	0
Total securities	0	0
Greater Than 90 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Repurchase agreements and repurchase-to-maturity transactions	0	0
Total securities	0	0
U.S. Treasury and agency securities
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	293,539	307,633
U.S. Treasury and agency securities | Overnight and Continuous
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	293,539	307,633
U.S. Treasury and agency securities | Up to 30 days
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0	0
U.S. Treasury and agency securities | 30-90 days
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0	0
U.S. Treasury and agency securities | Greater Than 90 days
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0	0
Asset-backed securities
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0
Asset-backed securities | Overnight and Continuous
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0
Asset-backed securities | Up to 30 days
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0
Asset-backed securities | 30-90 days
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0
Asset-backed securities | Greater Than 90 days
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0
Mortgage loans
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	460,072	698,974
Mortgage loans | Overnight and Continuous
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	460,072	698,974
Mortgage loans | Up to 30 days
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0	0
Mortgage loans | 30-90 days
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0	0
Mortgage loans | Greater Than 90 days
Debt Instrument [Line Items]
Repurchase agreements and repurchase-to-maturity transactions	0	0
Corporate securities
Debt Instrument [Line Items]
Securities lending transactions	94,155	118,817
Repurchase agreements and repurchase-to-maturity transactions		0
Corporate securities | Overnight and Continuous
Debt Instrument [Line Items]
Securities lending transactions	94,155	118,817
Repurchase agreements and repurchase-to-maturity transactions		0
Corporate securities | Up to 30 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Repurchase agreements and repurchase-to-maturity transactions		0
Corporate securities | 30-90 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Repurchase agreements and repurchase-to-maturity transactions		0
Corporate securities | Greater Than 90 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Repurchase agreements and repurchase-to-maturity transactions		0
Equity securities
Debt Instrument [Line Items]
Securities lending transactions	12,798	5,699
Equity securities | Overnight and Continuous
Debt Instrument [Line Items]
Securities lending transactions	12,798	5,699
Equity securities | Up to 30 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Equity securities | 30-90 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Equity securities | Greater Than 90 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Preferred stock
Debt Instrument [Line Items]
Securities lending transactions	75	755
Preferred stock | Overnight and Continuous
Debt Instrument [Line Items]
Securities lending transactions	75	755
Preferred stock | Up to 30 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Preferred stock | 30-90 days
Debt Instrument [Line Items]
Securities lending transactions	0	0
Preferred stock | Greater Than 90 days
Debt Instrument [Line Items]
Securities lending transactions	$ 0	$ 0

COMMITMENTS AND CONTINGENCIES (

COMMITMENTS AND CONTINGENCIES (Details)	Mar. 31, 2018USD ($)
Indemnification Agreement
Commitments and contingencies
Indemnification agreement with certain officers, maximum	$ 10,000,000

EMPLOYEE BENEFIT PLANS (Details

EMPLOYEE BENEFIT PLANS (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Qualified Pension Plan
EMPLOYEE BENEFIT PLANS
Company contribution	$ 0
Qualified Pension Plan | Minimum
EMPLOYEE BENEFIT PLANS
Adjusted funding target percentage to be maintained	80.00%
Qualified Pension Plan | Qualified Pension Plan
EMPLOYEE BENEFIT PLANS
Service cost — benefits earned during the period	$ 3,441,000	$ 3,348,000
Interest cost on projected benefit obligation	2,397,000	2,191,000
Expected return on plan assets	(4,026,000)	(3,352,000)
Amortization of prior service cost	0	0
Amortization of actuarial loss/(gain)	0	0
Preliminary net periodic benefit cost	1,812,000	2,187,000
Settlement/curtailment expense	0	0
Total net periodic benefit costs	1,812,000	2,187,000
Nonqualified Excess Pension Plan | Qualified Pension Plan
EMPLOYEE BENEFIT PLANS
Service cost — benefits earned during the period	387,000	334,000
Interest cost on projected benefit obligation	359,000	297,000
Expected return on plan assets	0	0
Amortization of prior service cost	0	0
Amortization of actuarial loss/(gain)	265,000	118,000
Preliminary net periodic benefit cost	1,011,000	749,000
Settlement/curtailment expense	0	0
Total net periodic benefit costs	$ 1,011,000	$ 749,000

ACCUMULATED OTHER COMPREHENSI77

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 7,127,199
Total other comprehensive income (loss)	(576,444)	$ 161,733
Ending Balance	6,392,342		$ 7,127,199
Offset of net unrealized losses in AOCI due to impact those net unrealized losses would have on certain of the Company's insurance assets and liabilities had the net unrealized losses been recognized in net income	340,200		(6,300)	$ 424,100
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	12,696	(654,523)	(654,523)
Other comprehensive income (loss) before reclassifications	(577,225)		684,247
Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings	681		7,153
Amounts reclassified from accumulated other comprehensive income (loss)	100		1,594
Total other comprehensive income (loss)	(576,444)		692,994
Cumulative effect adjustments	(10,552)		(25,775)
Ending Balance	(574,300)		12,696	(654,523)
Unrealized Gains and Losses on Investments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	25,874	(656,322)	(656,322)
Other comprehensive income (loss) before reclassifications	(577,712)		700,536
Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings	681		7,153
Amounts reclassified from accumulated other comprehensive income (loss)	11		642
Total other comprehensive income (loss)	(577,020)		708,331
Cumulative effect adjustments	(10,552)		(26,135)
Ending Balance	(561,698)		25,874	(656,322)
Accumulated Gain and Loss Derivatives
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	747	727	727
Other comprehensive income (loss) before reclassifications	487		(563)
Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings	0		0
Amounts reclassified from accumulated other comprehensive income (loss)	89		451
Total other comprehensive income (loss)	576		(112)
Cumulative effect adjustments	0		132
Ending Balance	1,323		747	727
Minimum Pension Liability Adjustment
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(13,925)	$ 1,072	1,072
Other comprehensive income (loss) before reclassifications	0		(15,726)
Other comprehensive income (loss) relating to other-than-temporary impaired investments for which a portion has been recognized in earnings	0		0
Amounts reclassified from accumulated other comprehensive income (loss)	0		501
Total other comprehensive income (loss)	0		(15,225)
Cumulative effect adjustments	0		228
Ending Balance	$ (13,925)		$ (13,925)	$ 1,072

ACCUMULATED OTHER COMPREHENSI78

ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Reclassifications Out of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reclassifications out of accumulated other comprehensive income (loss)
Benefits and settlement expenses, net of reinsurance ceded	$ (786,802)	$ (749,642)
Realized investment gains (losses): All other investments	(87,599)	22,841
Net impairment losses recognized in earnings	(3,645)	(7,831)
Total before tax	91,798	112,349
Tax (expense) or benefit	(17,686)	(36,935)
Net income	74,112	75,414
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Gains and losses on derivative instruments
Reclassifications out of accumulated other comprehensive income (loss)
Benefits and settlement expenses, net of reinsurance ceded	(113)	(205)
Total before tax	(113)	(205)
Tax (expense) or benefit	24	72
Net income	(89)	(133)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Unrealized gains and losses on available-for-sale securities
Reclassifications out of accumulated other comprehensive income (loss)
Realized investment gains (losses): All other investments	2,783	9,481
Net impairment losses recognized in earnings	(3,645)	(7,831)
Total before tax	(862)	1,650
Tax (expense) or benefit	181	(578)
Net income	$ (681)	$ 1,072

INCOME TAXES - Narrative (Detai

INCOME TAXES - Narrative (Details) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Expected net refund in future period		$ 6,200,000
Reduction in unrecognized tax benefits	$ 0

INCOME TAXES - Income Tax Recon

INCOME TAXES - Income Tax Reconciliation (Details)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Statutory federal income tax rate applied to pre-tax income	21.00%	35.00%
State income taxes	1.20%	0.60%
Investment income not subject to tax	(2.80%)	(3.20%)
Unrealized tax positions	0.00%	0.50%
Other	(0.10%)	0.00%
Effective tax rate (as a percent)	19.30%	32.90%

OPERATING SEGMENTS (Details)

OPERATING SEGMENTS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Summarized financial information for the company's segments
Revenues	$ 1,165,832	$ 1,105,297
Pre-tax Adjusted Operating Income (Loss)	92,821	135,389
Realized (losses) gains on investments and derivatives	(1,023)	(23,040)
Income before income tax	91,798	112,349
Income tax expense	(17,686)	(36,935)
Net income	74,112	75,414
Adjusted operating income tax (expense) benefit	(18,044)	(44,999)
After-tax adjusted operating income	74,777	90,390
Income tax benefit (expense) on adjustments	358	8,064
Realized investment (losses) gains:
Derivative financial instruments	78,059	(69,878)
All other investments	(87,599)	22,841
Net impairment losses recognized in earnings	(3,645)	(7,831)
Less: related amortization	9,156	(10,744)
Less: VA GLWB economic cost	(21,318)	(21,084)
Operating Segment Assets
Investments and other assets	74,132,583		$ 75,973,148
DAC and VOBA	2,434,154		2,199,577
Other intangibles	651,707		663,572
Goodwill	793,470		793,470
Total assets	78,011,914		79,629,767
Life Marketing
Summarized financial information for the company's segments
Revenues	434,916	421,392
Pre-tax Adjusted Operating Income (Loss)	(17,849)	18,945
Operating Segment Assets
Investments and other assets	14,744,343		14,914,418
DAC and VOBA	1,374,149		1,320,776
Other intangibles	277,489		282,361
Goodwill	200,274		200,274
Total assets	16,596,255		16,717,829
Acquisitions
Summarized financial information for the company's segments
Revenues	379,094	401,367
Pre-tax Adjusted Operating Income (Loss)	55,520	53,667
Operating Segment Assets
Investments and other assets	19,275,508		19,588,133
DAC and VOBA	90,466		74,862
Other intangibles	33,909		34,548
Goodwill	14,524		14,524
Total assets	19,414,407		19,712,067
Annuities
Summarized financial information for the company's segments
Revenues	150,713	108,642
Pre-tax Adjusted Operating Income (Loss)	40,531	53,007
Operating Segment Assets
Investments and other assets	20,535,539		20,938,409
DAC and VOBA	800,941		772,634
Other intangibles	166,784		170,117
Goodwill	336,677		336,677
Total assets	21,839,941		22,217,837
Stable Value Products
Summarized financial information for the company's segments
Revenues	53,868	40,843
Pre-tax Adjusted Operating Income (Loss)	29,080	23,899
Operating Segment Assets
Investments and other assets	4,571,793		4,569,639
DAC and VOBA	6,133		6,864
Other intangibles	7,889		8,056
Goodwill	113,813		113,813
Total assets	4,699,628		4,698,372
Asset Protection
Summarized financial information for the company's segments
Revenues	76,375	80,083
Pre-tax Adjusted Operating Income (Loss)	6,218	5,599
Operating Segment Assets
Investments and other assets	1,016,586		918,952
DAC and VOBA	162,465		24,441
Other intangibles	130,573		133,234
Goodwill	128,182		128,182
Total assets	1,437,806		1,204,809
Corporate and Other
Summarized financial information for the company's segments
Revenues	70,866	52,970
Pre-tax Adjusted Operating Income (Loss)	(20,679)	$ (19,728)
Operating Segment Assets
Investments and other assets	13,988,814		15,043,597
DAC and VOBA	0		0
Other intangibles	35,063		35,256
Goodwill	0		0
Total assets	$ 14,023,877		$ 15,078,853

SUBSEQUENT EVENTS (Details)

SUBSEQUENT EVENTS (Details) - USD ($)	May 03, 2018	May 01, 2018	Mar. 31, 2018
P L I C O | Subsequent Event
Subsequent Event [Line Items]
Coinsurance basis percentage		100.00%
Ceded commissions for reinsurance		$ 422,900,000
Statutory reserves resulting from reinsurance, business acquired		$ 13,300,000,000
Amended Line Of Credit
Subsequent Event [Line Items]
Line of credit, maximum borrowing capacity			$ 1,000,000,000
Line of credit, maximum borrowing capacity to be granted upon entity's request			1,250,000,000
Line of Credit | Amended Line Of Credit
Subsequent Event [Line Items]
Line of credit, maximum borrowing capacity to be granted upon entity's request			$ 1,250,000,000
Line of Credit | Amended Line Of Credit | Subsequent Event
Subsequent Event [Line Items]
Line of credit, maximum borrowing capacity	$ 1,000,000,000
Credit facility term	5 years
Line of credit, maximum borrowing capacity to be granted upon entity's request	$ 1,500,000,000
Bridge Loan | Line of Credit | Amended Line Of Credit | Subsequent Event
Subsequent Event [Line Items]
Line of credit, maximum borrowing capacity	50,000,000
Letter of Credit | Line of Credit | Amended Line Of Credit | Subsequent Event
Subsequent Event [Line Items]
Line of credit, maximum borrowing capacity	$ 500,000,000